---Why were you late for school today?----It was ________ I help catch a thief o
题型：不详难度：来源：
---Why were you late for school today?
----It was ________ I help catch a thief on the bus.| A．since | B．as | C．for | D．because |
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答案
| D |
解析
试题分析：连词辨析。Since表示众所周知的原因；as由于；for表示补充说明，一般放在句末；because用来回答why的问句。句意：—为什么你今天上学迟到？—就是因为我帮助在车上抓了一个贼。故D正确。
点评：对于表示原因的四个连词的本题侧重点：Since表示众所周知的原因；as由于；for表示补充说明，一般放在句末；because用来回答why的问句。 |
举一反三
Scientists study ___________ human brains work to make computer.| A．when | B．how | C．that | D．whether |
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Today,_________ rapid transportation and communication , the whole world seems to be smaller.| A．regardless of | B．in spite of | C．instead of | D．because of |
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I will not go to her birthday party ___________ I am invited.| A．as if | B．only if | C．even if | D．if only |
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______ he has made up his mind, no one can make him change it.| A．Once | B．Unless | C．Until | D．As |
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| We were ______ surprised at the news that we couldn’t say anything. |
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