To reach the world’s richest country, you don’t need to set out for the Middle East, but for the South Pacific, to a tiny dot just south of the equator, called Nauru. Only 8.2 square miles in size, the whole of this county can be seen form the air as the plane comes into land. The blue South Pacific Ocean reaches for thousands of miles in all directions, the nearest piece of land Ocean Island 200 miles to the east.

Nauru is so small that the plane lands in what is best regarded as the capital’s main street. The seaward side of the runway has traffic lights at each end to stop cars when planes are landing. The tiny bus station outside the airport is crowded with well-fed and brightly clothed Naurans with their modern cars.

With Naurans now getting an average of $44,500 a year, the island’s 60,000 people seem to have little to worry about. A trip to the island’s central hump (隆峰) tells a slightly different story.

The hump with a great deal of phosphate (磷酸盐) round is Nauru’s wealth. When Nauru gained freedom from the British government in 1968, about 40 million tons of the earliest 100 million tons of phosphate were left. Since it has taken out another 10 million tons, the rest is only enough for another 20-25 years.

68.The best title for the passage should be .

A.Wealth and population of Nauru

B.The most beautiful country in the world

C.A small island surrounded by the South Pacific Ocean

D.A small but rich island country

69.It can be inferred from the passage that .

A.Nauru has not build a runway in the airport yet

B.Nauru is not large enough to build a runway of the plane

C.the Naurans are not rich enough to build a runway of the plane

D.no cars run on the main street

70.From the last sentence of the passage we can learn that the writer wants to tell us

A.why Naurans are so rich

B.something more about Nauru

C.something for Naurans to worry about

D.how the British robbed Nauru of their wealth

71.How many tons of phosphate will probably be taken out in Nauru per year?

A.2,000,000 to 2,500,000 tons.

B.2,800,000 to 3,500,000 tons.

C.1,200,000 to 1,500,000 tons.

D.400,000 to 500,000 tons.