It is said in the book that Thomas Edison (1847—1931) ________ the world-leading
题型：不详难度：来源：
It is said in the book that Thomas Edison (1847—1931) ________ the world-leading inventor for sixty years. | A．would be | B．has been | C．had been | D．was |
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答案
| D |
解析
| 根据括号内的1847—1931可知，此处应填过去时态；另外，由于没有另一个过去的时间或动作与之比较，故不能用过去完成时，即只能选D。 |
举一反三
—What’s that terrible noise?
—The neighbors ________ for a party. | A．have prepared | B．are preparing | C．prepare | D．will prepare |
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The student didn’t pay any attention to the lecture; he ________ of something else. | A．thought | B．had thought | C．would think | D．was thinking |
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—Didn’t the guard see him breaking into the bank?
—No, he ________ in the other direction. | A．was looking | B．had looked | C．looked | D．is looking |
|
Because the shop ________ , all the T-shirts are sold at half price. | A．has closed down | B．closed down | C．is closing down | D．had closed down |
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—Has Sam finished his homework today?
—I have no idea. He ________ it this morning. | A．did | B．has done | C．was doing | D．had done |
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