一、单项选择 从A、B、C、D四个选项中，选出可以填入空白处的最佳选项。
( ) 1. There is _______ “u” and _______“s” in the word “use”.
A. an; a B. a; a C. a; an D. an; an
( ) 2. How many _______do you want?
A. glass of apple juice B. glass of apple juices C. glasses of apple juice D. glasses of apples juice
( ) 3. To keep , we should eat _______food.
A. health; healthy B. healthy; health C. health; health D. healthy; healthy
