Helen her keys in the office so she had to wait until her husband home. [ ] A.ha
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![Helen her keys in the office so she had to wait until her husband home. [ ] A.ha](/pic/43_991935.jpg)
Helen ________ her keys in the office so she had to wait until her husband ________ home.
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A.has left; comesB.left; had comeC.had left; cameD.had left; would come试题答案
答案:C