Scientists think that the continents ____ always where they ___today.A．aren"t;
题型：不详难度：来源：
Scientists think that the continents ____ always where they ___today.| A．aren"t; are | B．aren"t; were | C．weren"t; are | D．weren"t; were |
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答案
| C |
解析
| 由关键词：today看出前后对比，时态也要用现在和过去对比。 |
举一反三
The Titanic, the biggest ship of its day, ____ unsinkable, but it sank on its first voyage in 1912. | A．thought | B．was thought | C．thought it | D．was thought it |
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—Nothing. I ____ to myself.| A．had only talked | B．am only talking | | C．have just talked | D．was just talking |
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The novels written by the author sell best, but five years ago no one could have imagined how great a role he _____in the literary world.| A．was playing | B．was to play | C．had played | D．played |
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—If your wife does, so _____ mine. |
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