18．-Who approved of your action in this conflict area？
-We acted ________ the UN．（　�。�
A．under the pressure ofB．under the umbrella of
C．under the command ofD．under the authority of

分析 --誰批準(zhǔn)了這一沖突地區(qū)的行動(dòng)？--我們在聯(lián)合國的授權(quán)下行動(dòng)．

解答 答案D．under the pressure of在…的壓力下；under the umbrella of在…的保護(hù)下；under the command of在…指揮下；under the authority of在…的授權(quán)下．聯(lián)系上面approve of該語境，再根據(jù)句子所表達(dá)的含義，可知選擇D．

點(diǎn)評 本題考查介詞短語詞義辨析．在熟知詞義的基礎(chǔ)上，再聯(lián)系句子所表達(dá)的含義，從而可以選出正確的答案．

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