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
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It was lucky that little Jack was not at home when the fire broke out；otherwise，he his life．
#87644
A
had lost
B
would lose
C
would have lost
D
might lose
Eliza remembers everything exactly as if it _________ yesterday.
#90453
A
was happening
B
happens
C
has happened
D
happened
This is his only request that the room_______ after being used.
#87382
A
be cleaned
B
would be cleaned
C
is cleaned
D
will be cleaned
The experts present at the conference all insisted that greenhouse gas emission be reduced from now on．
#86506
A
must
B
will
C
/
D
can
___________, he would have been fired.
#88131
A
Had he lied to the boss
B
Did he lie to the boss
C
If he has lied to the boss
D
If he lies to the boss