题目内容
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 |
B
解析

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题目内容
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 |
B
解析