改错题 70.My pain should have been apparent the moment I walked into the room, for the first man I met asked sympathetically: "Are you feeling all right?"

A、 must have been
B、 would have been
C、 must have done
D、 should have done

【正确答案】 A

【答案解析】这句话的意思是：我的痛苦在昨天进门的那会一定表现得很明显，因为我碰见的第一个人充满同情地问我“你还好吗”。此题考查情态动词must have done的使用，表示对已发生情况的肯定推测，意为“(过去)一定……”，所以选A。