40. Polluter means a vessel ______ harmful substances into the air. Which word below is appropriate to fill in the blank?
(A) spilling
(B) spreading
(C) emitting
(D) injecting

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統計: A(46), B(35), C(159), D(16), E(0) #2652724

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40. 污染者是指向空氣中排放有害物質的...
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