Our supply of food is ________ now . We’d better store some .


  1. A.
    running out
  2. B.
    running out of
  3. C.
    run out
  4. D.
    using up
A
短語辨析。run out of 后接物品名詞，主語一般是人
run out 一般以物做主語，表示該物以用光,以主動形式表示被動意義
sb. use up sth.
be used up 意義與run out 相同，它本身就是被動形式，主語只能是物。
根據(jù)題意，我們的食品供應(yīng)用完了，主語為物，且為謂語動詞的邏輯賓語。故選A。
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   C. reduce the cost of turning it into electric power

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