题目内容
The reason_________ he didn't come was _________ he had to take care of his sick mother.
| A.why ; that | B.why ; which |
| C.which ; why | D.that ; for |
A
本题是一道定语从句与宾语从句的交叉考查。why引导的从句作为句中的定语,that引导的从句作为句中的宾语。
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