题目内容
We don’t know the reason _____ he didn’t accept the job.
| A.for what | B.for that | C.for which | D.for why |
C
考查定语从句。for which= why,当先行词为reason时。如果前面有介词,引导词只能使用which,故选C。
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题目内容
| A.for what | B.for that | C.for which | D.for why |