We never know we will succeed ________ we actually try.
#55283
A
until
B
when
C
unless
D
though
推荐题目
The police ____ still not sure ______ the young man killed himself or was killed.
#56977
A
is, if
B
is, whether
C
are , whether
D
are, that
—Where’s my cat, Bill? —There aren’t any cats here, ___________ there’s a little dog.
#58203
A
but
B
and
C
or
D
with
— May I go to the concert with you?— I’m afraid not ______ you have a ticket, because I have only one.
#56096
A
unless
B
since
C
if
D
though
---Hi! Long time no see.---Yes. It’s almost three years_____ we met last time.
#57008
A
while
B
before
C
since
D
until