That dog ought to be destroyed ______ it attacks any more children.
#31233
A
until
B
since
C
after
D
before
推荐题目
Tom had been studying French hard for nearly three years he mastered it．
#30569
A
after
B
when
C
since
D
before
We’re living in ________ people call “Information Age”，so everything is possible.
#30246
A
what
B
that
C
which
D
why
Why do you insist on buying a car ______ you have such good public transportation here?
#30138
A
because
B
unless
C
when
D
though
As a green hand, he doesn’t know______ it takes to start a business here.
#30179
A
when
B
how
C
what
D
which