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问题: I'd like to know_____.

A.when we to have the car repaired
B.when will we have the car repaired
C.when to have the car repaired
D.when we having the car repaired
这题答案是C 为什么A,D 不可以呢?请各位多多指教

解答:

know 后面应该加一个名词,或者可以当作名词的句子.答案选C.A的语序不完整,B是疑问语气,改成when we will have the car repaired就可以选.D也不完整.
解释得不详细,不好意思.