the woman looks young.she _________be fifly.can't or mustn't.can'_英语解答

the woman looks young.she _________be fifly.can't or mustn't.
can't mustn't can must

人气：425 ℃　时间：2020-03-29 07:24:45

解答

答案应该是can't ,表示不可能,而mustn't 表示禁止,所以不对.