问题
选择题
－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
答案
答案：C
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”。