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更新 2022-09-03
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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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____ the 1990s, the number of antelopes had fallen to about 50,000.

A．During

B．Since

C．By

D．Over

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难度：未知

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I'll never forget the day _______ I bought my own guitar with my own money.

A．where

B．on which

C．on when

D．that

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难度：未知

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--Are you sure to help me find____________ bed for my new house?
--Of course, but not now. I'm heading, for____________ bed and a good sleep.

A．a, a

B．a, 不填

C．the, a

D．a, the

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难度：未知

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The old couple married for 40 years and never once____ with each other.

A．they had quarreled.	B．they have quarreled
C．have they quarreled	D．had they quarreled.

题型：未知
难度：未知

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—Will you buy me a new iPod, Dad?
—OK. You __________have one if you promise to take care of it.

A．might

B．must

C．could

D．shall

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