If we         now to protect the environment, we’ll live to regret it.
#53390
A
hadn't acted
B
haven't acted
C
don't act
D
won't act
推荐题目
Many parents are always ________ their kids ________ others’.
#60756
A
compare, with
B
compare, to
C
comparing, about
D
comparing, with
How long have you __________ this book?
#52454
A
bought
B
borrowed
C
had
D
lent
Let’s _______ to the opera tonight.
#55637
A
go
B
to go
C
going
D
went