The Antarctic Icecap is the largest supply of fresh water，representing nearly 2％of the world’s total of fresh and salt water. As can be seen from the table below, the amount of water in our atmosphere is over 10 times as much as the water in all the rivers taken together. The fresh water actually available for human use in lakes and rivers and the accessible ground water amount to only about one-third of 1％of the world’s total water supply.

	Surface area(sq mi)	Volume(cu mi)	Percentage of total
Salt water
The oceans	139,500,000	317,000,000		97.2％
Inland    seas    and saline lakes	270,000	25,000		0.008
Fresh water
Freshwater lakes	330,000	30,000		0.009
All rivers(average level)	－	300		0.0001
Antarctic Icecap	6,000,000	6,300,000		1.9
Arctic Icecap and glaciers	900,000	680,000		0. 21
Water in the atmosphere	197,000,000	3,100		0. 001
Ground water within half a mile from surface a mile from surface	－	1,000,000		0. 31
Deep-lying ground water	－	1,000,000		0. 31
Total (rounded)	－	326,000,000		100.00

小题1:What’s the best title of this passage?

A．Fresh Water in the World	B．Water Supply of the World
C．Salt Water of the Earth	D．Protection of the Water in the World

小题2:It can be seen from the table______.

A．humans will have to use sea water in the future

B．there is enough fresh water for man to use

C．Water in the atmosphere is the least

D．the sea water takes up 98％of the water on earth

小题3:The fresh water that humans can use is _________.

A．about 1,086,700 cu mi	B．about 6,300,000 cu mi
C．about 680,000 cu mi	D．about 2,000,000 cu mi

小题4:Where does the majority of fresh water exists?

A．In Arctic Icecap and glaciers.	B．In Deep ground.
C．In the Antarctic Icecap.	D．In the atmosphere.

小题5:What are the two places where equal amount of fresh water is stored?

A．Freshwater lakes and all rivers(average level)

B．Antarctic Icecap and water in the atmosphere

C．Ground water within half a mile from surface and Deep-lying ground water.

D．Deep-lying ground water and Arctic Icecap and glaciers