The government has taken measures          air quality.
#95080
A
to improve
B
improved
C
being improved
D
to be improved
推荐题目
The discovery of new evidence led to _______. 
#98440
A
the thief having caught
B
catch the thief
C
the thief being caught
D
the thief to be caught
The girl is very shy, and never speaks until ___ to.
#98679
A
spoken
B
speaking
C
speak
D
be spoken
Time ____ never comes again. So we’d better make full use of our time. 
#96385
A
losing
B
lost
C
being lost
D
having lost
It should not be a question of humans_________ and nature ____________.
#95500
A
win; losing
B
winning; lost
C
win, lost
D
winning, losing