_____ you have worked out the first problem, you may go on to work on the second.
#31378
A
Even if
B
Unless
C
Now that
D
Though
推荐题目
Some people like coffee, _____others like tea. It’s all a matter of personal taste.
#31429
A
which
B
however
C
what
D
while
Although he had only entered the contest for fun, _________ he won first prize.
#79835
A
but
B
and
C
even
D
不 填
It is because she loves her students _____ she is respected by them.
#33103
A
who
B
which
C
what
D
that
I was so familiar with her that I recognized her voice I picked up the phone.
#80255
A
the moment
B
after
C
before
D
while