With more forests being destroyed, huge quantities of good earth __________ each year, which __________ that our environment is suffering.

—Is that Dec.21,2012 is the end of the world true?—Definitely not，but ________ must be paid to global climate change.

Yesterday if the policeman _______earlier, the fight between the two boys would have been prevented. 

 ---Can I join your club, dad?---You can when you _______ a bit older. 

She hurried to the entrance at which the car _____, and looked forward to seeing her husband.