真题练习

815.If I ______ plan to do anything I wanted to,I'd like to go to Tibet and travel through as much of it as possible.

A.would
B.could
C.had to
D.ought to

816.I was on the highway when this car went past followed by a police car.They _______ at least 150 kilometers an hour.

A.should have been doing
B.must have been doing
C.could have done
D.would have done

答案解析
815.答案是B;根据句意，此题表示与现在事实相反。
816.答案是B;此处为对过去事情的肯定推测，意为想必是，一定是。