问题
When you are sleeping, you had better _____ all your windows closed. [ ]
A: not to keep
B: not keep
C: not to keeping
D: not keeping
B: not keep
C: not to keeping
D: not keeping
正确答案是：
同类题型
Do you want ______ ice cream ______ dessert? [ ]
What’s your favourite fruit?—Apples. You know, _______ apple a day keeps the doctor away.
Tom and Mike enjoy __________ TV.
The more exercise you take, the ____you will be.
How old is your daughter? — ______ . We had a special party for her _____ birthday last week.