1. The guide (lead, led) the hikers to the river.

2. Marlo has (passed, past) the fitness test with flying colors.
3. By the time we got to the store, it was (already, all ready) closed.
4.Honesty is just one of the (principals, principles) of Tamika's moral code.
5.We drove (past, passed) the intersection and had to turn around.
6. ( Who's, Whose) coming with us to play?
7. (Your, you're) the magician my sister was telling me about yesterday.
8. Do you know (who's, whose) boots these are?

1.lead
2.passed
3.already
4.principals
5.past
6.Who's
7.You're
8.whose

All are right except 1 and 4.

Could you please explain #4 so I can understand between the two?

The most common use of principal is the principal of a school. (The princiPAL is your PAL.) It means the most important.

http://dictionary.reference.com/browse/principal

A principle is a rule of conduct or an idea.

http://dictionary.reference.com/browse/principle

Mr. Takagi is the (principle, principal) violinist in the orchestra.

So in the sentence would it be principal?

To determine the correct word to use in each sentence, we need to understand the difference in meaning between the different options.

1. The correct word is "led," which is the past tense of the verb "lead." This is because we are talking about the guide taking the hikers to the river in the past.

To find the correct answer, we need to understand the difference between "lead" and "led." "Lead" is the present tense form of the verb, which means to guide or show the way. "Led" is the past tense form of the verb, which means that someone has already guided or showed the way.

2. The correct word is "passed." We use "passed" to indicate that Marlo successfully completed the fitness test.

To confirm the use of "passed," we need to understand the difference between "passed" and "past." "Passed" is the past tense of the verb "pass," which means to successfully complete or go beyond something. "Past" refers to a time or something that has gone by.

3. The correct word is "already." This is because we are talking about the store being closed at the time we arrived.

To determine the correct answer, we need to differentiate between "already" and "all ready." "Already" is an adverb that means something has occurred or happened before a specific time. "All ready" means everything is prepared or set.

4. The correct word is "principles." This is because we are referring to one of Tamika's moral values or beliefs.

To find the correct answer, we need to understand the difference between "principals" and "principles." "Principals" usually refers to a person in a position of authority, like a school principal. "Principles" refers to values or guidelines that govern behavior or decision-making.

5. The correct word is "past." This is because we are talking about driving beyond the intersection.

To confirm the use of "past," we need to differentiate between "past" and "passed." "Past" refers to a direction or position beyond something. "Passed" is the past tense of the verb "pass," which means to successfully go beyond or surpass something.

6. The correct word is "Who's." This is a contraction of "who is."

To confirm the use of "Who's," we need to understand the difference between "Who's" and "Whose." "Who's" is a contraction of "who is" or "who has." "Whose" is a possessive pronoun that indicates ownership.

7. The correct word is "You're." This is a contraction of "you are."

To confirm the use of "You're," we need to understand the difference between "Your" and "You're." "Your" is a possessive pronoun that indicates ownership. "You're" is a contraction of "you are."

8. The correct word is "whose." This is because we are asking about the ownership or possession of the boots.

To confirm the use of "whose," we need to understand the difference between "who's" and "whose." "Who's" is a contraction of "who is" or "who has." "Whose" is a possessive pronoun that indicates ownership.