Question

【题目】Mr.Black________his keys in the office，so he had to wait until his wife ________ home.

A. has left；comes

B. left；had come

C. had left；came

D. had left；would come

Answer 1

【答案】C

【解析】

句意：Mr.Black已经把他的钥匙忘在了家里，因此他不得不一直等到他的妻子回家。根据下文so he had to wait until his wife ________ home.可知上文用过去完成时，其结构是had done的形式。短语leave sth.+介词短语，表示把某物遗忘在某地。Leave的过去分词是left；时态保持一致，第二个空用一般过去时态，短语come back表示回来，come的过去式是came。根据题意，故选C。