Nothing can be done _______ he returns.
#56142
A
as
B
before
C
while
D
until
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The twin sisters have learned a lot ________ they came to China.
#55315
A
when
B
after
C
since
D
as soon as
There's a red car parking in our neighborhood. Do you know _____ it is?
#56310
A
what
B
who
C
whose
D
Where