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1.She asked the young man___.答案是B为什么不选A呢?

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1.She asked the young man___.答案是B为什么不选A呢?
A.what's wrong with him B.what was wrong with him C.what's trouble D.how was he
2.___mathematics is the base of all other sciences.答案是A为什么不选C呢?
A.This is because B.This is that C.It is that D.Because
3.The method___you solved the problem is good.答案是C为什么不选B呢?
A.with that B.that C.with which D.which
4.It was said___was how the Chinese first raised silkworms.答案是C为什么不选A呢?
A.that B.which C.that that D.of that
1.选择A项可能会造成前后时态不一致.因为 what's 可以是 what was 也可以是 what is.
2.This is because:这是因为,而 that 是一个指示性代词,那个,那是;也可做形式主语,也可指代一句话;你要看前文是否有提及的名词或句子.而且that明显没有 因为 一词的意思,无法使句子连贯通顺.
3.选B是因为 with the method 是一个词组,如果选 that 就会使句子缺失成份,很多词组放置句首都是用 介词+which 来引导后面句子.that不能和介词直接连用来引导句子.
4.It was said that:据说,是一个惯用句型.所以不能把这里面的that同时用于后一句话的形式主语,当然还需要一个that来引导后面的句子.英文中省略很常见,但是是有原则,要遵循一定的规则.不能使句子缺少关键的主、谓、宾.
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