Question

He was late for work this morning because he_______find his key．

A.mustn't
B.wouldn't
C.couldn't
D.shouldn't

Answer 1

【答案】：C
本题考查情态动词辨析。句意：他由于找不到钥匙，今天早上上班迟到了。mustn’t表示“禁止”；wouldn’t表示“不会”；couldn’t表示“不能”；shouldn’t表示“不应该”。根据句意，本题选c。