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45.     our earth, or else it will be no longer fit for us to live on.

     A.Protected         B.To protect        C.Protecting        D.protect

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44.     is smoking allowed here in the lecture hall.

     A.At no time        B.In no time         C.At one time       D.At a time

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43.The news has spread all over the country      the spaceship succeeded in returning.

     A.that              B.which             C.whether          D.what

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42.-How did you enjoy the performance last night?

-       ! My favorite singer lost his voice and didn’t even appear.

     A.What a failure                          B.What a disappointment

     C.How awful                             D.What dissatisfactory

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41.You don’t look very    . I think you should go home now and take a good rest.

     A.good             B.well              C.strong            D.healthy

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40.We have to     the wheat as soon as possible because a storm is on the way.

     A.get away         B.get across        C.get through       D.get in

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39.To keep healthy, Professor Johnson      cycling as a regular form of exercise after he retired.

     A.took up           B.caught on         C.carried out        D.made for

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38.Tom was gentle and he often talked with others    a low voice but this time he shouted suddenly      the top of his voice.

     A.in, at             B.at, in             C.at, with           D.in, with

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37.     you don’t like him is none of my business.

     A.What             B.Who              C.That              D.Whether

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36.     in a dark room, the little girl was so frightened as to cry loudly.

     A.Leaving lonely     B.Left alone         C.Being left alone   D.To be left lonely

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