the sentence , so he asked the teacher to explain it again.A．Not having und
题型：不详难度：来源：
the sentence , so he asked the teacher to explain it again.| A．Not having understood | B．As he didn’t understand | | C．Having not understood | D．He didn’t understand |
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答案
| D |
解析
试题分析：句意：他不理解这个句子，所以他请求老师再解释一次。选项AC都是非谓语动词，因为整个句子已经有并列连词so，所以前后应该都是句子，故排除ABC，故选D。
点评：本题难度适中。连词主要考查它们的意义及句法功能，但是它们是在一定的语言环境下而出现的，所以考生必须能正确理解句子的句意。
即学即练：I can’t come back________six o’clock perhaps. Don’t wait for me for supper.
A. after B. if C. until D. when
解析:C。句意：until引导时间状语从句时常与not连用，意为“我大约直到6点才能回来”，故选C。 |
举一反三
There is a popular view in cities, strangers are less likely to help an elderly person.| A．that | B．whether | C．why | D．how |
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--- Did Jack come back early last night?
--- Yes. It was not yet eight o’clock ______ he arrived home.| A．before | B．until | C．when | D．af ter |
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_____ we gave him something to eat, he would save it up for his little sister.| A．Whatever | B．However | C．Whichever | D．Whenever |
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Electronic devices such as iPods and headphones can do great harm to our hearing if _______ improperly.| A．being used | B．used | C．to be used | D．having been used |
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The question ______ we can raise enough money for the project in a week is being discussed.| A．that | B．what | C．whether | D．which |
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