Please _________ because this is a reading room.  
#59430
A
quiet
B
to be quiet
C
to quiet
D
be quiet
推荐题目
______ your hand over your mouth when you cough. 
#66193
A
Put
B
Putting
C
To put
D
To be putting
_____ through this book and tell me what you think of it. 
#66199
A
Look
B
Looking
C
To look
D
Having looked
_____worried about me,Mom.I’ve grown up.
#59483
A
Don’t
B
Don’t be
C
Not
D
Not be