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--        does your sister practice singing English songs? ----Twice a week.
#56345
A
How soon
B
How long
C
How far
D
How often
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Don’t stop working _____ twelve. 
#58157
A
to
B
at
C
when
D
until
Lucy fell asleep_______ she was listening to music.
#58200
A
before
B
while
C
after
D
as soon as
Some people won’t realize the importance of their health _____they have lost it.
#56772
A
after
B
when
C
until
D
as
 --_______ will the meeting last? --_______ they reach an agreement.
#55956
A
How long; Not until
B
When; Not until
C
How long; Until
D
When; Until
I met a friend of mine       I was walking in the park.
#56579
A
before
B
when
C
because
D
until