1. C. because
2. D. went
3. A. in
4. A. any
5. A. a
6. B. but
7. B. on
8. D. but
9. C. worst
10. B. finishes
11. D. over
12. C. most delicious
13. D. but
14. A. must
15. A. have
16. A. Swimming

Here's a breakdown of why these are the correct answers:

1. C. because is the correct conjunction to show a cause-and-effect relationship. The sentence means that he wants to go to the park, but he needs to finish his homework first.
2. D. went is the correct verb form to express a past action. The sentence means that they went to the zoo last weekend.
3. A. in is the correct preposition to indicate location. The cat is hiding inside the bed.
4. A. any is the correct indefinite pronoun to use with a negative verb. The sentence means that she doesn't have any friends.
5. A. a is the correct indefinite article to use with a singular countable noun. The sentence means that she wants to buy a new dress for the party.
6. B. but is the correct conjunction to show a contrast. The sentence means that I wanted to go to the concert, but my parents insisted on going to the movie.
7. B. on is the correct preposition to indicate location. The keys are on the table.
8. D. but is the correct conjunction to show a contrast. The sentence means that I enjoy reading, but I also like watching movies.
9. C. worst is the correct superlative adjective to express the highest degree of something negative. The sentence means that it was the worst day of my life.
10. B. finishes is the correct verb form to express a future condition. The sentence means that if she finishes her homework, she can watch TV.
11. D. over is the correct preposition to indicate movement across something. The cat is jumping over the fence.
12. C. most delicious is the correct superlative adjective to express the highest degree of something positive. The sentence means that it was the most delicious cake I've ever tasted.
13. D. but is the correct conjunction to show a contrast. The sentence means that she is intelligent, but she is humble.
14. A. must is the correct modal verb to express a strong obligation or necessity. The sentence implies that it is essential for you to finish your homework before going out.
15. A. have is the correct verb form to agree with the subject "The team, along with their coach." Although "coach" is singular, the phrase "along with their coach" makes the subject plural, so the verb must be plural as well.
16. A. Swimming is the correct answer because it is the gerund form of the verb "swim," which is used to talk about activities or hobbies.