問題詳情
33. I was on the highway when this oar west 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
參考答案
答案：B
難度：適中0.5
統計：A(0),B(0),C(0),D(0),E(0)