生物功能材料:.He can't be at school,____ ? A.is he B.isn't he C.can he D.can't he请帮忙解释为什么选A。

.He can't be at school,____ ? A.is he B.isn't he C.can he D.can't he请帮忙解释为什么选A。 改错. He mustn't be at home. I saw him here just now. It isn't quite ___ that he will be present at the meeting. can't be helped we can't hare fhe car___(stop) be anguy m'th与be anguy at的区别 能否说：He can't be able to win the race if he doesn't run fast enough.是否要将can't改成won't? can't be和mustn'be的区别 can't be和mustn'be的区别 can't be和mustn'be的区别 He can't stand on his head by himself,can he