皮皮学，免费搜题
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【单选题】
—— Do you think you can repair this machine without help? —— _________. This is not the first time for me to do so.A.
Don’t worry.
B.
All right.
C.
Don’t mention it.
D.
No problem.
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皮皮学刷刷变学霸
举一反三
【单选题】When you are sleeping, you had better _____ all your windows closed. [ ]
A.
don't keep
B.
not keep
C.
not to keep
D.
don't to keep
【单选题】According to the author, if you want to keep healthy, you had better ______.
A.
make the room dry
B.
keep the food in the refrigerator
C.
wash your hands as much as possible
D.
clean the suces with anti-bacterial products
【单选题】You had better keep the medicine () is inaccessible to children.
A.
that
B.
where
C.
where it
D.
in which
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