If  we ___________some measures, we might have prevented the environmental pollution.
#87466
A
take
B
had taken
C
took
D
have taken
推荐题目
----She didn’t take the medicine last night, did she?­   -----              .
#87123
A
No, but I wish she wouldn’t
B
No, but I wish she had
C
Yes, but I wish she did
D
Yes, but I wish she would
 If you______to her about it yesterday, you ______ what to do now. 
#86633
A
should have spoken; would know
B
spoke; would know
C
had spoken; would have known
D
had spoken; would know
—You didn’t invite Mary to the ball?—____ her, too? 
#89489
A
Must I invite
B
Should I have invited
C
Must I have invited
D
Should I invite