The teacher won’t begin the class ______ all the students ______.
#60700
A
until ; stop to talk
B
until; stop talking
C
if; stop to talk
D
if ; stop talking
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If you want to listen to music, please _______ the radio first. 
#56136
A
get off
B
get on
C
turn off
D
turn on
It’s important_______in the New Year.
#62674
A
keeping healthy
B
to keep healty
C
kept fit
D
to keep fit
The West Lake is famous for its beautiful scenery.
#54706
A
is bad for
B
is useful for
C
is good for
D
is well-known for