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20.E-shopping, when properly      , can save us a lot of time and energy.

    A.done          B.is done         C.having done     D.doing

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19.If we go on using energy so wastefully,     are that our oil wells will be dried up, before new energy sources can be found to replace oil.

    A.difficulties      B.chances        C.questions       D.problems

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18.Penny      sobbing at last, and dried her eyes with her handkerchief.

    A.left alone       B.left behind      C.left off         D.left out

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17.---I’d have made a phone call to you,     your telephone number.

  ---That’s all right. What was up then?

    A.if I knew                       B.had I forgotten  

    C.if I hadn’t remembered             D.but I forgot

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16.---I want someone to write the composition for me.

  ---No. As a student, you     depend on yourself.

    A.shall           B.will           C.can           D.may

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15.---Mrs. Brown, could you please tell us why your home---cooked meat usually taste so delicious?

  ---Sure. The meat would be    if you cook it slow.

    A.the all best      B.all the best      C.all the better     D.the all better

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14.In order to     the financial storm, many families cut their daily expenses.

    A.prevent        B.survive         C.quit           D.keep

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