The final tests are coming, and the students _______ hard for them these days.
#36137
A
study
B
will study
C
are studying
D
studied
推荐题目
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
By the time she went outside, the bus ____ already ______ .
#41951
A
had, gone
B
had, went
C
has, gone
D
has, went
—What do you often do at weekends?—I often _________ my grandparents.
#36326
A
visit
B
visited
C
have visited
D
will visit
Beijing ______a lot in the past ten years. Now it has become one of the biggest modern______ in the world.
#38493
A
changes, cities
B
changed, city
C
changed, cities
D
has changed, cities
– Look at these factories. I hate them. They____ many rivers here. --Yes. Something ______ to stop the pollution.
#39701
A
polluted, must do
B
had polluted , must be doing
C
have polluted , must be done
D
were polluting, must be done