How can you keep the machine()when you are away?
类型:单选题
问题:How can you keep the machine()when you are away?
选项:
run
to run
running
being run
答案:C
解析:
本题考察的是非谓语动词,你怎么能在你离开的时候让机器一直运转?keep sth doing,doing表示主动进行,作宾补。
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