. (1分)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

.
(1分)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

出自：山东第一医科大学英语3

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