____________ make so much noise. The students are taking an exam.
#59433
A
Isn't
B
Doesn’t
C
Don’t
D
Haven’t
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______ until the lights have turned to green. 
#66190
A
Wait
B
To wait
C
Waiting
D
Having waited
----________play in class !
#59468
A
Not
B
Don’t
C
No
D
Doesn’t
____the speed limits, or you’ll get fined $ 200 for speeding.
#65971
A
If you don’t keep to
B
Keeping to
C
To keep to
D
Keep to