In each passage that follows, connect the two sentences by converting one of them into a dependent (or subordinate) clause. Change the wording if necessary. Here are some subordinate conjunctions you'll find useful:

after since
although unless
as when
because where
before whereas
provided that while

1. After eating, you should wait two hours before meditating. The digestive process prevents the full use of the mind.

Since the digestive process prevents the full use of the mine, you should wait two hours after eating before meditating. (or before meditating after eating???)

2. George has worked as a ticket-taker in a movie house for the last twenty years. Nevertheless, he has managed to save enough money to buy a Rolls-Royce.

Although George has worked as a ticket-taker in a movie house for the last twenty years, he has manged to save enough money to buy a Rolls-Royce.

3. Most teachers oppose extending the school year beyond the customary nine months. Most parents favor the plan.

Whereas most teachers oppose extending the school year beyond the customary nine months, most parents favor the plan.

4. Faith's mother told her she could marry any man she chose. The only condition was that he had to be a nobleman.

Provided that he be a nobleman, Faith's mother told her she could marry any man she chose.

5. The Kodiak bear never attacks human beings. This generalization does not hold true, however, if the bear is starving or believes her cubs to be in danger.

Unless it is starving or believes her cubs to be in danger, the Kodiak bear never attacks human beings.

II. Each of the following exercises contains two sentences. Link the two sentences by turning the second one into a dependent clause introduced by: who(m), whose, which, or that.

1. Alfonso Smith introduced me to four newcomers. They were all interested in joining the Young Socialists.

Alfonso Smith introduced me to four newcomers, all of which were interested in joining the Young Socialists.

2. Simone de Beauvoir has written a brilliant book on old age. The book exposes and condemns our society's cruelty toward old people.

Simone de Beauvoir has written a brilliant book on old age which (or that?) exposes and condemns our society's cruelty toward old people.

3. Buffalo Bill was a buffalo hunter and an Indian fighter. Unfortunately he became the symbol of the American West.

Buffalo Bill was a buffalo hunter and an Indian fighter who (or whom??) unfortunately became the symbol of the American West.

4. Buddhism comes closest to what the Western world calls "worship" in bhatki yoga. This consists of dedicating one's life to a beloved person, activity, or cause.

Buddhism which consists of dedicating one's life to a beloved person, activity, or cause comes closest to what the Western world calls "worship" in bhatki yoga.
(I'm not sure if I set this up write, I don't know if you need commas or something but if you do put commas wouldn't be an appositive instead of a dependent clause??)

5. In acient mythology, the argument about which sex gets more pleasure from lovemaking was settled by old Tiresias. He had been both a man and a woman.

In acient mythology, the argument about which sex gets more pleasure from lovemaking was settled by old Tiresias who (or whom?) had been both a man and a woman.

III. Each of the following sentences contains two or more sentences. Change every sentence but the first into an appositive phrase.

1. The appositive is a great favorite among professionals. However, it is a device neglected by beginners.

The appositive, a device neglected by beginners, is a great favorite among professionals.

2. Isis grants special favors to all who perform the ritual we are about to enact. Isis is the Egyptian goddess of the moon.

Isis, the Egyptian goddess of the moon, grants special favors to all who perform the ritual we are about to enact.

3. George Smithers charges $25 an hour for tiddlywinks lessons. Smithers is the best tiddlywinks player in the valley.

George Smithers, the best tiddlywinks player in the valley, charges $25 an hour for tiddlywinks lessons.

4. Dr. Holmquist has been invited to speak to the Linguistics Club. Dr. Holmquist is our new specialist on morphemes.

Dr. Holmquist, a new specialist on morphemes, has been invited to speak to the Linguistics Club.

5. In 1840 the Rosalie was discovered drifting off the coast of the Bahamas, with is cargo intact but without the slightest trace of its crew. The Rosalie was a French merchant ship bound from Hamburg to Havana.

In 1840 the Rosalie, a French merchant ship bound from Hamburg to Havana, was discovered drifting off the coast of the Bahamas, with its cargo intact but without the slightest trace of its crew.

1. I would do it this way... using "one" instead of "you" and separating the two prepositional phrases.
Since the digestive process prevents the full use of the mind, after eating one should wait two hours before meditating.

4. The modifying phrase needs to be closer to the modified word.

Faith's mother told her she could marry any man she chose, providing that she chose a nobleman.

5. Again, put the modifying phrase as close to the modified word as possible.\
The Kodiak bear,nnless it is starving or believes her cubs to be in danger, never attacks human beings.
II

Generally use who or whom for people.
1.Alfonso Smith introduced me to four newcomers, all of whom were interested in joining the Young Socialists.

2. Either which or that would be fine. However there is a redundancy that needs fixing since it confuses the sense..... get rid of "on old age"
Simone de Beauvoir has written a brilliant book (on old age) which exposes and condemns our society's cruelty toward old people.

3. remember "who" subject, "whom" object

4. Here I think you have confused the meaning of the sentence. Look at the modifing sentence as related to the words "bhatki yoga"

5. Use "who". Who is the subject pronoun, "whom" is the object pronoun.

Your part III is fine!

Great job on part III! Here are some corrections for parts I and II:

I. Connecting sentences with subordinate clauses:
1. After eating, you should wait two hours before meditating because the digestive process prevents the full use of the mind.

2. Although George has worked as a ticket-taker in a movie house for the last twenty years, he has managed to save enough money to buy a Rolls-Royce.

3. Whereas most teachers oppose extending the school year beyond the customary nine months, most parents favor the plan.

4. Provided that he is a nobleman, Faith's mother told her she could marry any man she chose.

5. Unless it is starving or believes her cubs to be in danger, the Kodiak bear never attacks human beings.

II. Linking sentences with relative pronouns:
1. Alfonso Smith introduced me to four newcomers, all of whom were interested in joining the Young Socialists.

2. Simone de Beauvoir has written a brilliant book that exposes and condemns our society's cruelty toward old people.

3. Buffalo Bill was a buffalo hunter and an Indian fighter who unfortunately became the symbol of the American West.

4. Bhatki yoga consists of dedicating one's life to a beloved person, activity, or cause, which comes closest to what the Western world calls "worship" in Buddhism.

5. In ancient mythology, the argument about which sex gets more pleasure from lovemaking was settled by old Tiresias, who had been both a man and a woman.

I hope this helps! Let me know if you have any other questions.