With more forests being destroyed, huge quantities of good earth      each year.

Whatever they end up doing, they      __themselves a great deal.

 In the last twenty years, seven Canadian scientists _____ the Nobel prize! 

—I heard the peasants here        very poor in the past.—Yes,but there        great changes in the past few years.

By the time he realizes he       into a trap, it’ll be too late for him to do anything about it.