【实例解析】
1.When he ________ home, he saw his mother cleaning the room.
A. got up B. got back C. got off D. got on
答案：B。该题考查的是短语动词的用法。根据题意，空白处所填的短语动词的意思应该是“回到”，所以选got back。
2.Father is sleeping. You’d better ________ quiet.
A. to keep B. keep C. keeping D. kept
答案：B。该题考查的是常见句型。had better 后接动词原形，所以应选keep。
3.---Would you mind _________ my pet dog while I’m away.
---Sure, no problem.
A. setting up B. looking after C. turning down D. keeping out
