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选修六 Unit 4 Helping people around the world Ⅰ.单项填空 1.—Have you seen my notebook？ —Oh，Jane must take it ；she has the same one as yours. A.on purposeB.by chance C.by accident D.by mistake 解析：take sth.by mistake是“拿错”的意思，根据后面she has the same one as yours可以判断是错拿。on purpose“有意地、故意地”；by chance，by accident均表示“偶然”。故选D。 答案：D 2.Although the wind has ，the rain remains steady.So you still need a raincoat. A.turned up B.gone back C.died down D.blown out 解析：turn up“出现”；go back“回去”；die down“变弱，逐渐停止”；blow out“被(风等)吹熄，吹灭”。C项符合题意。 答案：C 3.The moment he came back from work，he working on his invention. A.set about B.set out C.set off D.set up 解析：句意：一下班回来，他就着手研究他的发明。set about doing sth.“着手做……”；用set out其后加to do sth.；set off“出发，动身”；set up“建立，设置”。 | 
