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正确答案C
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正确答案C
