1．Plants ______ oxygen which is needed by nearly every organism on the planet．（　�。�
A．let outB．give upC．leave outD．set off

分析 植物釋放出幾乎地球上所有的有機體都需要的氧氣．

解答 答案是A．本題考查動詞短語辨析．let out 發(fā)出，泄露； give up 放棄；leave out省略，遺漏；set off出發(fā)；引發(fā)，燃放；根據(jù)句意和常識判斷，植物"釋放"氧氣，故答案選擇A．

點評 關(guān)于短語動詞的解題，首先要積累識記盡可能多的短語動詞及其含義，然后結(jié)合語境進行合理的推斷．

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