问题补充:
-Oh, my God! I can find my key to the office.
-Don worry. Perhaps it at your home.
A. left
B. has left
C. was left
D. had left
答案:
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”。