状语从句,说出选择这个答案的原因,解析（最好还有翻译）

状语从句,说出选择这个答案的原因,解析（最好还有翻译）
5. You will be late ______________you leave immediately.
A. unless B. until C. if D. or
6. ___________, Mother will wait for him to have dinner together.
A. However late is he B. However he is late
C. However is he late D. However late he is
7. If we work with a strong will, we can overcome any difficulty, ______________great it is.
A. what B. how C. however D. whatever
8. We won’t give up ______________we should fail ten times.
A. even if B. since C. whether D. until
9. She doesn’t speak ____________her friend, but her written work is excellent.
A. as well as B. so often as C. so much as D. as good as
10. He’ll be happy ____________he may be.
A. when B. if C. because D. wherever

A.5.You will be late ______________you leave immediately.
译文：除非你马上离开,不然你会迟到的.
A.unless 除非 B.until C.if D.or
D 6.___________,Mother will wait for him to have dinner together.
译文：不管他回来得多晚,妈妈都会等他一起吃晚饭.
However late he is = No matter how late he is
A.However late is he B.However he is late
C.However is he late D.However late he is
C 7.If we work with a strong will,we can overcome any difficulty,______________great it is.
如果我们有坚强的意志去工作,不管有多大的困难,我们都会克服.
A.what B.how C.however D.whatever
A 8.We won’t give up ______________we should fail ten times.
即使我们失败了十次,我们都不会放弃.
A.even if B.since C.whether D.until
D 9.She doesn’t speak ____________her friend,but her written work is excellent.
她说的没有她的朋友那么能说,但是她写的作品很优秀.
A.as well as 也 B.so often as C.so much as D.as good as
D 10.He’ll be happy ____________he may be.
不管他在哪里,他都会很快乐.
A.when B.if C.because D.wherever
再问： 能把为什么选择这个答案的原因也写一下吗？谢谢
再答： 5. A 四个选项的意思分别为： A. unless 除非 B. until 直到...,通常跟not 搭配，也就是not ......until C. if 如果 选if 的话 ，不合句意 D. or 或者，否则, 如：You must leave immediately, or you will be late.你得要马上离开，否则你会迟到的。 6.D 这一题考的是however的用法。这样用的 however 与 no matter how 大致同义，这样用的however具有连词的功能，用以引导让步状语从句。 其词序为：however+形容词或副词+主语+谓语。 如：1）People always want more, however [no matter how] rich they are. 人总是富了还想再富。 7.C 与第6题相同，只是这里要注意一下whatever的用法。whatever也用于引导让步状语从句 ，但其语序为：Whatever+主语+谓语，whatever = No matter what 如：Whatever we said, he'd disagree. 无论我们说什么，他都不同意。 8.A 四个选项的意思分别为： A. even if 即使，纵然 B. since 自从，由于，通常用于现在完成时的句子里 ，例：I've been here since the end of June. 自6月末以来我就一直呆在这儿。 C. whether 其中的哪一个， 例： We don't know whether he's alive or dead. 我们不知道他是死是活。 D. until 直到。。。 例：The traffic laws don't take effect until the end of the year... 交通法要到年底才生效。 （这里有字数限制，你追问吧）