The children ＿＿very quiet；I wonder what they ＿＿up to.A．were； are beingB．are bei
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The children ＿＿very quiet；I wonder what they ＿＿up to.| A．were； are being | B．are being；are | C．are；do | D．are being；do |
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答案
| B |
解析
| be用于进行时可表示一个暂时的特点或表现。What they are up to相当于What they are doing。 |
举一反三
He ＿＿articles for our wall-newspaper these three years, and he ＿＿about forty articles.| A．has been writing； has written | B．has been writing； wrote | | C．is writing； has been writing | D．has written； has written |
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When he was alive, the old scientist used to say that knowledge ＿＿from practice and he gained his experience by doing a lot of practical work.| A．was coming | B．had come | C．comes | D．would come |
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In this experiment, they are woken up several times during the night, and asked to report what they＿＿.| A．had just been dreaming | B．are just dreaming | | C．have just been dreaming | D．had just dreamt |
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— What’s the matter?
— The shoes don’t fit properly. They＿＿＿＿my feet.| A．are hurting | B．will hurt | C．have hurt | D．are hurt |
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Hundreds of jobs ______ if the factory closes. | A．lose | B．will be lost | C．are lost | D．will lose |
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