【单选题】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
【单选题】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