I wouldn't manage to do it___ you had explained how.
#73583
A
unless
B
until
C
when
D
since
推荐题目
.If their marketing plans succeed, they ____ their sales by 30 percent.
#68240
A
will increase
B
have been increasing
C
have increased
D
would be increasing
At last he chanced to sail back towards the place _____ he had started. 
#71793
A
with which
B
for which
C
from which
D
on which
He is good at English, ______we all know. 
#73808
A
that
B
as
C
whom
D
what