It is difficult for us to learn a lesson in life ______ we’ve actually had that lesson.
#30782
A
until
B
after
C
since
D
when
推荐题目
How can they learn much ________ they spend so much time playing computer games?
#31302
A
although
B
when
C
till
D
until
________ song Jay Chou sings will become popular pretty soon.
#30081
A
What
B
Whatever
C
Whose
D
Whichever
______the Internet is of great help, I don’t think it’s a good idea to spend too much time on it.
#79821
A
If
B
While
C
Because
D
As