you must keep the door（ ）填open还是opening,
人气：152 ℃ 时间：2019-09-01 19:50:23
解答
open
keep sth + adj 把什么东西保持 ___ 的状态
open 是动词,也是形容词
形容词表示开着的
有必须把门保持开着You will succeed if you keep doing hard.keep doing sth 就是一直做某事
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