It’s said that ______of the water around the world___ polluted. 
#44439
A
two third , has
B
two thirds, have
C
two third, are
D
two thirds, is
推荐题目
Nobody ______ to go into the laboratory without permission (允许).
#44894
A
allows
B
is allowed
C
promises
D
is promised
 No children _____ to watch this kind of movie because it is too scary. 
#44565
A
should allow
B
should be allowed
C
shouldn't be allowed
D
don’t allow
---It’s difficult for the villagers to cross the river. ---I think a bridge______ over the river.
#44765
A
should be built
B
is being built
C
has been built
D
was built