Here are the correct answers for each sentence:
Look, she is eating one candy after ...
A. the otherHe travels to Spain every ... month.
A. otherOne city Polly wants to visit is Venice, ... is Rome.
B. the otherCaroline talked to Kate ... day.
A. anotherSome teens prefer rock, but ... prefer classical music.
B. othersPlease, give me ... ten pounds.
A. anotherSome places in this book are boring while ... are interesting.
A. the othersWe haven't finished the work. We need ... two hours.
B. anotherTania has been in only three countries. One is Nepal, and ... are, India and China.
C. the othersHere are two apples. I want the red one. Would you like ...?
A. the other
Good luck with your exam preparation!