9．While __________ the bridge，the workers contributed a lot．（　�。�
A．constructedB．constructing
C．were constructingD．construction

分析 在修建這座橋時(shí)，工人們貢獻(xiàn)很多．

解答 答案：B 考查現(xiàn)在分詞．the workers與construct之間是主謂關(guān)系，用現(xiàn)在分詞短語(yǔ)作狀語(yǔ)，相當(dāng)于while they were constructing the bridge．

點(diǎn)評(píng) 考查現(xiàn)在分詞，要弄清楚分詞與邏輯主語(yǔ)之間是主動(dòng)關(guān)系還是被動(dòng)關(guān)系，分詞所表示的動(dòng)作與謂語(yǔ)動(dòng)詞所表示的動(dòng)作的先后關(guān)系，然后，根據(jù)句意選擇最符合題意的選項(xiàng)．

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