英语 选择 (15 15:45:37)

问题描述:

英语 选择 (15 15:45:37)
 John was so sleepy that he could hardly keep his eyes ___.
A.open    B.to be open    C.to open    D.opening.
 
Thanks for your answering and explaining.

A.open
这里用的是keep sth adj这个结构,
open本身除了动词外,还是个形容词,所以原形就可以
但是如果是“关”,就要keep the door closed