1、We must start early,_______we have a long way to go.

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1、We must start early,_______we have a long way to go.
A.because B.for C.since D.as
错选B.
这几个词的区别究竟是什么?看到其他网站的说法有点懵,希望能简明清晰、准确无误地区别一下!
2、Another two months will be needed before the new bridge_____
A.completes B.is completed C.has completed D.will be completed
错选D.
老师说主将从现,可这不是条件状语从句,是时间状从啊?求详答!
3、I think it kind ____
A.of them to help me
B.for them to help me
C.that him help me
D.of him helping me
我错选D,但应该选A.这里helping me也可以来修饰him的吗?to do和doing这两个经常作为修饰用在句中,何时用to do何时用doing呢?麻烦举例详答下,越详细越好,我会加分的,
4、Some pictures _____by the students are on show.
我困扰了很久,这里填drawn.但我认为填which were drawn也是对的,但老师说如果这样填意思出了问题,是用法不对吗?还是这样填有失妥当?还是不符合外国语言习惯?

.as：从属连词,语意较because, since弱,着重在主句,所表示的原因或理由是"附带的".because：从属连词,语意强,着重直接的原因或理由,所引出的从句是全句的重心,用以回答why提出的问题.for：并列连词,语气较弱,所引出的句子一般放在后面,表示附带说明的理由或推断理由.since：语意比because弱,但比as强,一般用于表示"由于大家已知的事实".

2.Another two months will be needed 是主句,而before 自然就是从句了撒 ,所以就采用一般现在时表将来.

3.固定句型it good of sb to do sth 记着就好其实你记着it is kind to do sth 然后中间加个of sb 就好
4.
drawn 是过去分词在这里修饰pictures 表示被动和完成而which were drawn只有被动的意思.

We must start early,_____ we have a long way to go.A.because we must start early,____ we have a long way to go we must start early,____we have a long way to go.Abecause Bf I always believe we have a long way to go. We have a long way to go,so we have to walk_____(much）. we stil have a long way to we have a long way to go,（） we?括号里添什么? we still have a long way to go to solve all problems 的同义句 have long way to go还是have a long way to go we still have a long way to go,翻译的正式一点,怎么翻? This is wonderful,but we still have a long way to go. 求翻译We still have a long way to go even after we get to San F