Question

【题目】Helen ______ her keys in the office so she had to wait until her husband ______ home.

A. has left; comes B. left; had come

C. had left; came D. had left; would come

Answer 1

【答案】C

【解析】考查时态。由语境可推知leave的动作发生在had to wait之前，即过去的过去，应用过去完成时；come是until引导的时间状语从句的谓语动词，应用一般过去时表示过去将来时，故选C项。