A man does not know the difficulty of anything _____ he does it personally .
#80502
A
although
B
if
C
because
D
unless
推荐题目
My colleague has been recovering gradually since the operation, and it wont’ be long ______ he comes back to work．
#31739
A
before
B
since
C
after
D
when
The sales of houses in our city fell by 40 percent last month, 48 percent __________ we don’t count low-price houses provided for poor residents.
#31080
A
as
B
unless
C
if
D
before
The reason ____the little actress has been such a success is ____she is both clever and hard-working.
#29990
A
why, why
B
why, that
C
that, because
D
for, because
John thinks it won’t be long __________ he is ready for his new job.
#31238
A
when
B
after
C
before
D
since
____ this may sound like a simple process, great care is needed．
#33084
A
Since
B
Once
C
Although
D
Unless