4．They put forward a proposal at the meeting        cutting down the high housing price．（　�。�
A．aims atB．aimed atC．to aim atD．aim at

分析 他們?cè)跁?huì)上提出一項(xiàng)建議，旨在降低居高不下的房價(jià)．

解答 答案：B 題干中cutting down the high housing price是作目的狀語，要用非謂語動(dòng)詞；aim sth at…以…為目標(biāo)，proposal與aim之間構(gòu)成動(dòng)賓關(guān)系，要用被動(dòng)．故選B．

點(diǎn)評(píng) 過去分詞是非謂語動(dòng)詞的一種，用法很靈活，分為簡單式done（表示與謂語同時(shí)或幾乎同時(shí)發(fā)生的動(dòng)作）；完成式having been done（表示先于謂語的動(dòng)作）．學(xué)習(xí)時(shí)，要把握其用法特征：表示被動(dòng)和完成．同時(shí)還要注意區(qū)分現(xiàn)在分詞和不定式．

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