There      serious air pollution if people use more and more cars.
#36558
A
has
B
will be
C
will have
D
are going to be
推荐题目
The bridge _____ by the farmers themselves in 1982.
#37285
A
built
B
was built
C
build
D
was build
Ssh, please be quiet. The baby _______ .
#40226
A
sleep
B
sleeps
C
is sleepping
D
is sleeping
—Where ____ you ____ lunch? —At home.There was no school lunch
#42770
A
did;have
B
are;having
C
will;have
D
do;have
When I arrived at the cinema, the movie___________for10 minutes. 
#37965
A
has begun
B
had begun
C
had been on
D
has been