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?

问题描述:

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?

D因为, for引导的是一个并列句,它后面的句子一般作为前面的解释;because引导的是一个原因状语从句,它强调绝对的,所以why的句子,一定要用because回答.原因状语从句一般由because, since, as, for引导?注意as,because...