you must keep the door( )填open还是opening,
问题描述:
you must keep the door( )填open还是opening,
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