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49.(   ) Which of the following is WRONG according to the writer?

    A. Turn off the lights when you leave the room.   B. Close the doors in winter.

    C. Use a paper cup when you brush your teeth. D. Give your old clothes to the poor children.

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48.(   ) We can ___________to save paper.

    A. use a paper cup        B. use both sides of paper 

    C. give old books to a library    D. pick up waste paper at school

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46.(   ) From the above, we know that this is ____________.

    A. a sign    B. a notice   C. an advertisement   D. a proposal (提议)

(   )47 The writer tells us _____________.

    A. to throw rubbish into a dustbin      B. to pour dirty water into the river

    C. to save water by letting it run while we are brushing our teeth

    D. that we can’t do all these things until Earth Day

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44.(  ) A. Where     B. If         C. When        D. After

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43.(  ) A. happy     B. unhappy     C. sorry        D. difficult

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42.(  ) A. legs       B. hands       C. eyes        D. feet

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41.(  ) A. when      B. what        C. where        D. how

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40.(  ) A. ions       B. animals       C. lions        D. the other animal

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39.(  ) A. a        B. an         C. some       D. any

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