50.I was so tired that I couldn't keep my eyes _____A.openingB.openC.openedD.to open

问题描述:

50.I was so tired that I couldn't keep my eyes _____
A.opening
B.open
C.opened
D.to open

A

B. open

B.open
open
这里作adj.敞开的;
我非常累以致眼睛睁不开了.