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更新 2022-09-03
科目英语
题型单选题
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Los Angeles Times reported that researchers may have found a way to ______ human life by changing certain genes, so that humans might expect to live twice as long.

A．extend	B．preserve
C．multiply	D．transform

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相关试题

If this product does not give you complete satisfaction, please return it to the manufacturer, stating when it ________.

A．is purchased	B．will be purchased
C．purchases	D．has purchased

题型：未知
难度：未知

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—David, are you listening to me?
—Sorry, Dad. I ________ to make sense of what the reporter said.

A．was trying	B．have tried
C．am trying	D．tried

题型：未知
难度：未知

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—Look! Someone ________ the floor.
—Well, it wasn't me. I went shopping just now.

A．had swept	B．has swept
C．was sweeping	D．is sweeping

题型：未知
难度：未知

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It's said that they ________ a better life ever since they moved to the US.

A．had enjoyed	B．have been enjoying
C．were enjoying	D．would enjoy

题型：未知
难度：未知

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—Ouch! You hurt me.
—I'm sorry. But I ________ any harm. I ________ to drive a rat out.

A．don't mean; am trying

B．didn't mean; tried

C．haven't meant; tried

D．didn't mean; was trying

题型：未知
难度：未知

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