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更新 2022-09-03
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Some English scientists are identifying problems ____ technology in the 21st century. If solved, the solutions could change the world.

A．facing

B．faced

C．being faced

D．having faced

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Nothing seems to please her, _________?

A．does it

B．doesn’t it

C．is it

D．isn’t it

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She has breakfast at six every day, ________?

A．has she

B．hasn’t she

C．does she

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Mr. And Mrs. Turner work in this hospital, ________?

A．are they

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The Emperor’s clothes became the talk of the whole city, _________?

A．did it

B．didn’t it

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What fresh air, ________?

A．is it

B．does it

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