Each group of sentences contains two errors in parallelism. Underline these errors. Then, on the lines below, rewrite the unbalanced portion to make it parallel with the other listed items in the sentence.

1. Online dating is enjoyable, and it is exciting, but there are also difficulties. First, applicants have to write an introduction: then they must find a suitable photo: and finally, a decision must be made about which responses to answer.

a. also difficult
b. a decision about which responses to answer

2. Good teachers, a modern facility, and students who are hardworking have all given the high school an excellent reputation. The school replaced two smaller schools that were known as places where teachers were third-rate, shabby described the buildings, and students were frustrated.

a. hardworking students
b. shabby buildings

3. My sister is a terrific athlete. She enjoys tennis, plays volleyball, and even rock climbing. I, on the other hand, find it challenging enough to climb stairs, walk around the block, or running for a bus.

a. volleyball
b. climb up the stairs

4. With her long black hair, eyes that are sparkling and dark, and tall, slim body, Regina looks like a fashion model. But she worries that no one notices her intelligence and hard work. Regina wants people to know that a woman can have beauty, ambition, and be intelligent, too.

a. sparkling dark eyes
b. intelligence

5. Working conditions at the factory were poor: loud machinery, conversations that were
shouted, and blaring radios. Workers also complained about the low pay and the hours were long.

a. shouted conversations
b. long hours

Most are close, but study this webpage and the charts here to learn how to rewrite when correcting parallelism errors.

http://grammar.ccc.commnet.edu/grammar/parallelism.htm

I'll do #1 for you. Both sentences in #1 were non-parallel. I've underlined one and put the other in bold. Also, note the punctuation corrections in the second sentence.

1. Online dating is enjoyable and exciting, but it can also be difficult. First, applicants have to write an introduction; then they must find a suitable photo; and finally, they must decide about which responses to answer.

1. Online dating is enjoyable and exciting, but there are also difficulties. First, applicants have to write an introduction; then they must find a suitable photo; and finally, they must make a decision about which responses to answer.

a. also difficult
b. decide which responses to answer

2. Good teachers, a modern facility, and hardworking students have all given the high school an excellent reputation. The school replaced two smaller schools that were known as places where teachers were third-rate, buildings were shabby, and students were frustrated.

a. hardworking students
b. shabby buildings

3. My sister is a terrific athlete. She enjoys playing tennis, volleyball, and even rock climbing. I, on the other hand, find it challenging enough to climb stairs, walk around the block, or run for a bus.

a. volleyball
b. climb stairs

4. With her long black hair, sparkling dark eyes, and tall slim body, Regina looks like a fashion model. But she worries that no one notices her intelligence and hard work. Regina wants people to know that a woman can have beauty, ambition, and intelligence too.

a. sparkling dark eyes
b. intelligence

5. Working conditions at the factory were poor: loud machinery, conversations that were shouted, and blaring radios. Workers also complained about low pay and long hours.

a. shouted conversations
b. long hours