Question

–If you have a headache, you _________ lie down and have a good rest.  - Yes, you’re right.
A. shouldn’t
B. had better
C. mustn’t

Answer 1

B

解析试题分析：句意：如果你头疼，你最好躺下好好休息一下。是的，你说得对。A. shouldn’t不应该；B. had better最好；C. mustn’t不可以。结合句意可知，用B。
考点：考查情态动词的用法。