Howuniversecameintobeingisapuz

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更新 2022-09-03
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How ______ universe came into being is a puzzle to ______ scientists of all generations.
A. the; 不填 B. an; the C. a; 不填 C. 不填；the

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He removed the tree ____________ it was the best in the ground.

A．when

B．if

C．because

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The young man，who by then admission to university，decided to do some part-time jobs to gain more practical experience．

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----- The head teacher said we had only three days to finish the project.
-------Don’t worry. We have already _________ two thirds of it.

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A big earthquake __________7.1 on the Richter scale struck Yushu, knocking down buildings and causing more than two thousands people to lose their lives．

A．measured

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We work together to achieve our common purpose：_________world that is safer, cleaner and healthier than one we found．

A．the；the

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