Ⅰ. 单项选择(20分）
1. Please _____ quiet. The baby is sleeping.
A. to be B. be C. is D. are
【解析】选B。祈使句结构：Please+be+adj. .
2. Do you get to school _____ 7: 10 every morning?
A. by B. in C. on D. for
【解析】选A。句意：你每天早晨在7：10之前到学校吗？by意为“在……之前”。
3. They have to wear _____ for gym class.
A. dresses B. glasses
C. sports shoes D. shorts
【解析】选C。上体育课应该穿运动鞋，故只有C项符合。
