It was not until then that I came to know that knowledge _______ only from pract
题型：不详难度：来源：
It was not until then that I came to know that knowledge _______ only from practice.| A．had come | B．has come | C．came | D．comes |
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答案
| D |
解析
试题分析：考查时态。本句中的knowledge comes only from practice是一个客观真理；在任何情况下都使用一般现在时。故D正确。
点评：在英语中表示客观真理的句子在任何情况下都要使用一般现在时，这是一条永远都不变的规则。 |
举一反三
Great changes ______in his hometown in the last twenty years.| A．were taken place | B．have taken place | C．have been taken place | D．took place |
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We must work hard to a good knowledge of English.| A．acquire | B．catch | C．hold | D．take |
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--- What’s Joan doing?
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Whether ways will be found to help China _______ the current world financial crisis is just _______ worries the public.| A．prevent ;that | B．survive ;what | C．forbid; that | D．leave ;what |
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The telephone ______ three times in the last hour, and each time it _____ for my father.| A．had rung; was | B．has been ringing; is | C．rang; has been | D．has rung; was |
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