______ your hand over your mouth when you cough. 
#66193
A
Put
B
Putting
C
To put
D
To be putting
推荐题目
_____, I’m sure, and you’ll find her friendly and easy-going.
#66114
A
If you have a talk with Sara
B
Having a talk with Sara
C
Have a talk with Sara
D
After having a talk with Sara
 ________ at the door before you enter my room, please.
#66075
A
Knock
B
Knocking
C
Knocked
D
To knock
_________, I think, and the problems would be settled.
#66166
A
If you double your efforts
B
Making more efforts
C
So long as you don’t lose heart
D
A bit more effort
______ what the six blind men said sounded!
#66055
A
How foolishly
B
How foolish
C
What foolishly
D
What foolish