题目内容

The reason ________ he hasn’t come is ________.
A.that; because he is illB.that; because of his illness
C.why; for he is illD.why; that he is ill
D
________ he hasn’t come是定语从句,先行词The reason在定从中作原因状语,用why引导;is后是表语从句,不能用for引导,所以选D。
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