More and more people have realized that we won’t have cleaner water to drink unless something _______soon.
#44577
A
is done
B
was done
C
will be done
D
to be done
推荐题目
---Where’s your mother? ---Oh, she ______ Shanghai on business.
#44748
A
have been to
B
have gone to
C
has been to
D
has gone to
I think students _____ to do homework with friends.
#44494
A
should allow
B
should be allowed
C
were allowed
D
must be allowing
The little boy was made _____ again after his mother told him some jokes.
#44505
A
laughed
B
laugh
C
to laugh
D
laughing
This famous tower has a long history. It ______ more than 300 years ago.
#44667
A
builds
B
built
C
is built
D
was built
Trees ________ every year to make our city greener.
#44941
A
plant
B
are planted
C
were planted
D
will be planted