Remember when you learned to water ski, David? _________ you skied more, you got better and better. It’s the same with language study.
#32540
A
although
B
while
C
as
D
unless
推荐题目
_______cloning human embryos is not legal in many countries, some scientists are already pushing ahead with research in order to produce a cloned human baby.
#31691
A
While
B
When
C
Since
D
if only
It's important to learn how the whole system works. Sometimes, ________， it's the details that interest us the most.
#32141
A
therefore
B
meanwhile
C
furthermore
D
though
________ you have to do the job, you should try your best to do it well even though it may be very difficult for you.
#30258
A
Since
B
While
C
Unless
D
Though
He always brings me a pretty gift ____ he comes to visit me.
#33925
A
by the time
B
sometimes
C
every time
D
at times