They must be waiting for us,()?a.aren't they b.mustn't they
They must be waiting for us,()?a.aren't they b.mustn't they
They must be there now,aren't they?这里为什么不是mustn't they而是aren
let's hurry. they ________ be waiting for us. A.must B.could
They must have finished the work,---?A,mustn't they B,haven'
they aren't
They aren't English
no,----(they)aren't.
They __allowed to watch TV too long.A.don"t be B.aren"t C.do
Listen!His family must be quarreling,【aren't they?】,此句中【aren
They are walking,______ ______?( ) A.are they B.aren't they
must the us gate they waiting at school be for 连词成句
they ____(have) a meeting next week,aren't they?