请教有关高一定语从句2

题目

请教有关高一定语从句2
主句与定语从句之间用逗号隔开
其用法如何?
eg.
1.In our factory there are 2000workers,two thirds of( )are woman.
A.them B which C whom D who 答案为C我选的A
2.My neighbours used to give me a hand in time of trouble,( )was very kind of them.
A who B which C that D it 我选的D
3.I lost a book,( )I can't remember now
4.He is working hard,( )will make him pass the final exam.
A that B which C for which D who 我选的A

答案

下面的是我的详细解答,请看：
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