Never stand up ________ you are asked to.
#58222
A
if
B
since
C
unless
D
when
推荐题目
–_______________ does a CRH train run? –It runs up to more than 300 km an hour.
#56034
A
How long
B
How far
C
How fast
D
How soon
--- Mr. Green, I think physics is too difficult for me. ---Tom, work hard, _______ you’ll find it not as difficult.
#58226
A
or
B
but
C
so
D
and
You’ll fail your next English exam _______ you work harder from now on.
#55127
A
if
B
whether
C
until
D
unless
—Did you have a good time at the party?—Yes. We sang ______danced until late at night.
#57645
A
but
B
if
C
and
D
so