1.I'm busy sweeping the floor.

分析 我在忙著打掃地板.

解答 答案:sweeping.
根據(jù)所給首字母提示結(jié)合推測句意是"我在忙著打掃地板.",根據(jù)設(shè)空處前面的be busy 判斷設(shè)空處缺少動(dòng)詞的ing形式,所填單詞"打掃"是sweep,所以答案是:sweeping

點(diǎn)評 做這類題型,首先根據(jù)所給單詞首字母明確句子所要考查的單詞的拼寫,再結(jié)合相關(guān)語法知識對單詞做出形式上的變化.

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