题目

7. —Taking in less fat and salt and doing more exercise must be a reliable method of keeping fit, _____?
—Of course. Why not try it?
A. mustn’t theyB. mustn’t itC. aren’t theyD. isn’t it
不是两个动作吗?用they
6. —European scientists announced that the speed of light isn’t the speed limit.
—Perhaps it is the biggest challenge to Einstein’s Theory of Relativity. No one _____ any crack in his theory for more than a century.
A. has foundB. foundC. had foundD. would find
为什么不选A. has found
4. —Why didn’t you join in the final of talent shows?
—I _____ , but I was kicked out of the first round.
A. would like toB. wished toC. would D. was to have

提问时间：2020-07-24

答案