1)A library with five thousand books___to the nathion as a gift.答案是:has been offered,请问不什么不用have been offered? 2)My___deal with how to make__.答案是papers;paper,请问这句话是什么意思?为什么一个paper+s、另一个不+s? 3)The mother with her little son__at my home __that snowy night.答案是was;on,请问为什么不用were? 4)As a result of destroying the forest,a large __of desert__ covered the land.答案是quantity;has ,希望解释一下这句话 5)There was __time left that I had to glance at the headlines in the newspaper.答案是so little,为什么不用such little? 6)Mary and Henry are in the classroom,and __students have gone downstairs to the lab.答案是the other,但是不是应该只有在one...the other(s)这样搭配吗? 7)希望能讲一下当not only...but also 和either...or后面的动词加不加S应该看哪个主语?