题目内容：

并说明为什么,请各个大侠帮帮忙.
What a beautiful flat Especially there are many ______.
A.furniture B.furnitures C.pieces of furniture D.pieces of furnitures
Last term ,my boy won a ______prize.
A.50-dollar bill B.50-dollars bill C.50-dollar bills D.50-dollars bills
The Summer Palace lies_______northwest of our university
A.twenty-five miles B.twenty-five-mile C.twenty-five mile D.twenty and five miles
Computer science_____quickly in the 1990s.
A.has developed B.developing C.develop D.have developed
The storm has caused_______to this region.
A.much damage B.much damages C.few damages D.many damages
The world population will pass______by the end of this century.
A.six billion B.six billions C.the sixth billion D.sixth billions