请帮忙回答一下1、_____they had taken advantage of was_____I was young at that time.
A.All that……that B.What……that
为何选B不选A？
2、－Shall I introduce_____air-conditioners from abroad?
--Go ahead,if necessary.
A.a few more B. other C.some other
为何选C？air-conditioners不是可数名词の复数么？为何不用A呢？
3.certainly 可以用于否定、疑问句么？
可以の话为何A person in a rich family doesn't______live more happily than…….要用necessarily 而不用certainly?
4.He said he ____,so he can't have the pen on him now.
A.might have his pen lost
B. might lose his pen
C .might have lost his pen
D. might have had his pen lost
为何选B呢？ACD分别错在哪儿？
5.The rain didn't stop______made us stay at school until it was dark.
A which B. and it
为何不能选A呢？
6.Every boy and every girl has___their__own rights to ……
Every teacher ahd pupil at Eton Girls' college is proud of___her__school.
为何都是every A and B has……但划线部分却不同呢？，谢谢。

1,就是一个what引导的主语从句
2，这里需要填的语意是“一些其他的”，some other 正好合语意；再说a few 好像不能修饰more吧，一般我们要表达更多的用much 来修饰more
3，certainly可以，但是一般是用于陈述句，它更多的使用情况是做评价性的状语，用在句子开头，你自己以后可以多留意一下
4，我觉得A也是对的，因为有一个have something done的结构，B答案肯定是对的，那么C D就不对了嘛
5，其实A与B都是对的，只是前者是单句，后者是复句，作选择题时是选最佳答案，不是正确答案，后者不选是因为语言习惯
6，题目没给清楚，不甚理解
你的问题很有水平哈