We would have called a taxi yesterday if Harold us a ride home.
A. didn’t offer
B. wouldn’t offer
C. hasn’t offered
D. hadn’t offered
网友回答
A. didn’t offer
B. wouldn’t offer
C. hasn’t offered
D. hadn’t offered
解析：考查虚拟语气的条件句。would have done 表明是对过去的虚拟，所以条件句需要用had done。
句意：昨天如果哈罗德不主动开车送我们回家的话，我们就要打的了。