sweep off 扫清；吹走；大量清除

　　sweep out 扫掉；清除

　　sweep up 打扫干净，收拾干净，吹走；席卷 ◆ 即学即练 (1)Get a broom and ____________(打扫干净) the bits of paper and broken glasses on the floor，will you?

　　(2)The snow storm ____________(横扫)half of the country and caused millions of loss.

　　(3)Many bridges ______________(冲断了) by the flood. 答案：(1)sweep up　(2)swept　(3)were swept away 8．Then Wang Ping flashed a switch on a computer screen，and a table and some chairs rose from under the floor as if by magic. (P18) 然后王平在电脑荧屏上闪了一下开关， 于是一个桌子和几把椅子就像变魔术一样从地板下面升了起来。 ◆ 探究学习 阅读下列句子，注意flash 的搭配及意思 Did you use flash when you took these pictures？(n闪光,闪光灯) 你拍这些照片时用闪光灯了吗? A driver is not supposed to flash his lights at the coming vehicles. (vt .闪光；闪烁) 司机不该朝着迎面开来的车辆闪灯。 The disco lights were flashing on and off all night.（vi闪光；闪烁）迪斯科舞厅的灯整夜闪个不停。 The idea flashed into his mind. (vi.思想等的闪现；掠过) 这念头突然闪过他的脑海。 ◆ 词语归纳 a flash of lightning闪电 a flash of hope一线希望 as quick as a flash 快如闪电般地

　　in a flash转瞬间，立刻

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