To keep our classroom clean, please ______ waste paper whenever you see it.


  1. A.
    take up
  2. B.
    pick up
  3. C.
    put up
  4. D.
    send up
B
本題意思為：為了保持我們的教室干凈，無(wú)論何時(shí)你看到廢紙都應(yīng)該揀起來(lái)。A表示拿起，C表示舉起，D表示發(fā)射。只有B符合題意。
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