He must be ill ,for he isn't here.

He must be ill ,for he isn't here. He must be ill,----------he is absent today.为何答案为For?because为何不能用? 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 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's been ill.He must be t___ to hospital at once .I like this city .I want to stay here for a______ two years. three days ill he for be 连词成句 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.foHe must be ill,____________he looks so pale.A.since B.because C.as D.for为什么这里用for?什么情况下可以用for? Ill be right here for In this life ,must be good for he Tim felt ill last week.now he isn't well(用be ill,for one week写出其同义句) 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