－Oh, my God! I can't find my key to the office.
－Don't worry. Perhaps it at your home.
A. left
B. has left
C. was left
D. had left
网友回答
A. left
B. has left
(答案→)C. was left
D. had left
解析：考查动词被动语态的用法。“丢钥匙”的动作执行者是我，此句省略。“钥匙”，做主语，得用被动语态；这个动作发生在过去，用一般过去时“was+过去分词”。