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更新 2022-09-03
科目英语
题型单选题
难度较易
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挑错有奖

For more than a decade, experts from across the globe ________ on the cure of the disease that way.

A．worked

B．are working

C．have been working

D．were working

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相关试题

The woman _____ her boss of having broken the labor law because he fired her when she was pregnant.

A．blamed

B．charged

C．accused

D．scolded

题型：未知
难度：未知

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The business of the company was growing so fast that the manager had to _____ more workers.

A．take in

B．take on

C．take up

D．take after

题型：未知
难度：未知

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However, at times this balance in nature is disturbed, ____ a number of possibly unforeseen effects.

A．lying in

B．calling in

C．existing in

D．resulting in

题型：未知
难度：未知

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China's population is expected to increase to about 1.5 billion in 2040, ______it will start to decline slowly.

A．where

B．which

C．on which

D．after which

题型：未知
难度：未知

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Catching _____ sight of their head teacher coming, the students fell into silence all of _____ sudden.

A．the; the

B．/; a

C．the; a

D．/; /

题型：未知
难度：未知

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