More and more people have come to realize that if we had taken effective measures much earlier, the air quality ______ so seriously now. 
#86958
A
is not polluted
B
would not be polluted
C
had not been polluted
D
would not have been polluted
推荐题目
If you listen to me, you ____have some candies, Tommy.
#90147
A
are able to
B
shall
C
must
D
need
It is desired that the project________before the end of this month.
#87015
A
will be finished
B
is to be finished
C
be finished
D
is going to be finished
Mr. White _____ at 8:30 for the meeting, but he didn’t show up.
#86427
A
should have arrived
B
should arrive
C
should have had arrived
D
should be arriving
The doctor strongly recommended that he ________ a holiday.
#86367
A
would take
B
took
C
had taken
D
take