I. 单项选择（20分）
1. Doing morning exercises is good ______ our health.
A. to B. at C. for D. with
【解析】选C。句意：做早操有益于健康。be good for“对……有好处/益处”。
2. My parents want me _____ more exercise.
A. take B. takes C. taking D. to take
【解析】选D。句意：我父母想让我多锻炼。want sb. to do sth. “想让某人做某事”，固定搭配。
3. Everyone needs to _____ his or her health.
A. look after B. look at
C. look like D. look for
