He must be ill,----------he is absent today.为何答案为For?because为何不能用?

He must be ill ,for he isn't here. He coughs _____-(terrible).He must be ill. He must be ill,___he doesn’t come to school. The dentist thought he must be very.The dentist thought he must be very ill. He must be ill,----------he is absent today.为何答案为For?because为何不能用? He isn't at school .I think he ( )be ill.can,shall,must,has to ,原因. He must be ill,｛｝he looks so pale.A.since B.because C.as D.for那个是正确答案,为什么?He must be ill,｛｝he looks so pale.A.since B.because C.as D.for那个是正确答案,为什么? He must have been ill,or he ______ to the party last night.Awould have beenB should be C would be D had to be He must have been ill,or he ( )to the party last nigjtA would have been B should be C would be D had to be he must ( )here.《be》 He must be happy! He must be ill,__he looks so pale.A since Bbecause Cas Dfor 我选的是C ,为什么 He is ______(terrible) ill.He must stay in bed. He must have been ill,___ he?如何变反意疑问句 where is kangkang?He is ill.He___at home.A.can be B.may be C.must be选哪个比较好 理由 He's been ill.He must be t___ to hospital at once .I like this city .I want to stay here for a______ two years. He isn't in the school ,I think he ___ be ill .A.need B.shall C.must D.havt to ,为什么? -Tom isn't at school today.He ____ ill at home. -I'm not sure,let me call him. A may be B must be