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To test his idea,he invented a machine.
人气:352 ℃ 时间:2020-06-13 15:31:55
解答
To test his idea,he invented a machine.
首先to作目的状语,后加动词,后面是主句,过去式,machine可数
为了验证他的想法,他发明了一个机器
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