Helen her key in the office so she had to wait until her husband home. A. had le
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Helen ________ her key in the office so she had to wait until herhusband ________ home.
A. had left; came
B. has left; comes
C. left; had come
D. had left; would come
试题答案
答案:A
解析:Leave这个动作发生在had to wait之前,因此要用过去完成时;until引导的是时间状语从句,用一般过去时即可。
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