问题
选择题
-Must we keep the window __________ all the time?
-No, you don't have to.[ ]
A. opening
B. opened
C. to open
D. open
答案
答案：D
搜题请搜索小程序“爱下问搜题”
-Must we keep the window __________ all the time?
-No, you don't have to.[ ]
A. opening
B. opened
C. to open
D. open
答案：D