She seems to know nothing about the accident.She ____ been here.(_英语解答

She seems to know nothing about the accident.She ____ been here.(can't have,mustn't have).二选一

人气：233 ℃　时间：2020-10-01 22:59:21

解答

选 can't have
一般肯定（一定）用 must
否定时（不可能）用can't