问题描述：
It is ___ he is ill ___ the person you want to meet hasn't arrived.A.when,that B.because,that
It is ___ he is ill ___ the person you want to meet hasn't arrived.
A.when,that B.because,that
C.though,that D.that,because
It is ___ he is ill ___ the person you want to meet hasn't arrived.
A.when,that B.because,that
C.though,that D.that,because
问题解答：
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