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.

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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.
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.

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

A
keep sth+adj.表示让什么维持一种状态
open是adj.

a open可以做形容词表状态。

D
keep sb doing sth

选A,
keep sth adj. adj.表示一种状态。做宾补。
通常情况下open作为动词"打开"解释,
但open也可以作为形容词 a. 表示"打开的"

选A。这是keep sth +adj的搭配。

A上边已经解释的很详细了!

A