—I wonder how much you charge for your services.—The first two are free ________ the third costs $30.
#30476
A
while
B
until
C
when
D
before
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____ she goes, there are crowds of people waiting to see her.
#34699
A
Wherever
B
However
C
Whichever
D
Whoever
___ is the most useful invention?
#32091
A
Do you think which of these
B
Which of these you know
C
Which of these do you know
D
You know which of these