高中英语语法问题，求答案和详解

Question

1.--did jack come back early last night？
--yes，it was not yet eight o’clock ————he arrived。
A before B when C that D until
ps 能不能选D?
2.--did you come back early last night？
--yes ，it was at about nine————i arrived
A before B when C that D until
ps 能否选b
3.if you are travelling————the customs are really foreign to you own ，please do as the ramans do。
A in which B what C when D where
ps A和D的区别，为什么要选其一
4,how can you expect to learn anything ___you never listen？
A in case B even if C unless D when
ps 能否选A?
5, doing your homework is a sure way to improve your test scores ,and this is especially true ____it comes to classroom tests.
A since B as Cafter Dwhen
PS why can not choose A?
6.you have no idea how she finished the relay race ___her foot wounded so much.
A for B when C with Dwhile
ps why can not choose D?

Answer 1

第1题正确答案是B，这就是一个简单的时间状语从句，当他回来的时候，还不到八点。而not...until....是直到。。。才的意思，而且后面都接从句，如：He didn't come back until it is 10 o'clock. 直到10点他才回来。
第2题正确答案是C，强调句式。it...that固定结构。
第3题选D，感觉travelling后面好象少了一个先行词，这是一个关系副词where引导的定语从句，在从句中作状语。
第4题正确答案是D，但是如果没有D这个选项，选A也可以。假如的意思。这句话就是一个态度非常坚决的反问：当你从来都不听课的时候，你还怎么期望学到什么？
第5题应该选D，当。。。时候，A项是自从。。。的意思，你翻译一下这句话就会明白：做作业是提到学习成绩的可靠的方法，特别是当进行考试时证明它是正确的。
第6题正确答案是C，作伴随状语，后面是非谓语动词形式，而while后面接从句。

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