Many teenagers say that _____ they have a lot of friends, they really have no best friend.
#32317
A
when
B
while
C
if
D
because
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Inside the White House, there is a room called the Oval Office. That's ________ President Obama works.
#30317
A
why
B
where
C
what
D
how
—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
“It’s a secret….” he lowered his voice and whispered no one could overhear it.
#32582
A
in case
B
even if
C
so that
D
as if
I wrote to my parents once a week,____ I was too busy with my teaching work.
#80142
A
it
B
unless
C
when
D
as