Question

－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

Answer 1

C

考查動詞被動語態的用法。“丟鑰匙”的動作執行者是我，此句省略。“鑰匙”，做主語，得用被動語態；這個動作發生在過去，用一般過去時“was+過去分詞”。