1.It was essential that the application forms ----------

1.It was essential that the application forms __________
1.It was essential that theapplication forms ____________back before the deadline.
A.must besent B.would come
C.be sent D.were sent
选B,但为什么不选C?
2.If you _____that night,you mighthave been too late to get your ticket.
A.didn’thurry B.hadn’t hurried
C.wouldn’thurry D.had’t to hurry
我选择了D,为什么?
3.It’s decided that the present rate of deforestation_________to continue.
A.will not be allowed B.is not allowed
B.would not be allowed D.should not be allowed
我选择了A,为什么?