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
Class regulations require _____ is the last to leave the classroom _____ off all the lights.
#90190
A
who; should turn
B
whom; shall turn
C
whomever; turns
D
whoever; turn
—— Must I take a bus ? —— No, you＿＿＿＿. You can walk from here.
#89947
A
must not
B
don’t
C
don’t have to
D
had better not to
—May I speak to the patient now?—No, you _____. He is too weak now.
#90168
A
needn’t
B
may not
C
mustn’t
D
oughtn’t
What I advised was that he _______ physical exercise early in the morning.
#87364
A
would do
B
had done
C
do
D
did
—Will it take me long to get to the Sunshine Hotel?—No, it _______ take you long. It’s not the rush hour now.
#88901
A
shouldn’t
B
shan’t
C
mustn’t
D
needn’t