---What can I do for you, sir?--- I want _______apple juice and _____apple.A./; an B. an; an C. a; a
Helen ________watch TV at home _______ hang out with her friends.
---____ do you study for a math test? ---I study math ____ lots of exercises.
The little girl is ________ young ________ look after herself.
The two dresses are very nice. I can’t decide _________。
Sixteen-year-olds should _________their ears pierced.