请帮我完成英语的阅读理解

请帮我完成英语的阅读理解
“God made the world,but the Dutch made Holland.” True to this saying,the people of the Netherlands are again “making” their land.
About 1980 the Netherlands will complete a project begun in the 1920’s:transforming the Zyuder Zee,an inlet (小港) of the North Sea into dry land and a freshwater lake.By stages,550,000 acres of land will serve several purposes:industrial,recreational,military,and agricultural.Fed by the river Yssel,the remaining water basin Lake Yssel,about 300,000 acres will irrigate the surrounding land and help in the fight against salination (盐化作用).Excess water will drain through sluices into the sea.
As the first stop a nineteen-mile-long barrier dam,rising twenty-five feet above sea level,closed the entrance to the Zuider Zee.Then the experimental polder of a hundred acres preceded the first and smallest of the main polders fifty thousand acres that became dry land in 1930.The fifth and largest polder 150,000 acres will be the last of the Zuider Zee works.
Farmers for the new polder (开拓地) come from every province.The Eastern Flevoland polder,completed in 1957,became farmland for many from the province of Zealand which was badly hit by the disastrous floods of 1953.
31.This article gives a present-day example of how__________.
A.salty soils are desalinated B.the Netherlands has increased its land area
C.irrigation systems are built D.dams are constructed
32.The period taken for the Zuider Zee project is__________.
A.from 1900 up to 1960 B.from the 1920 till about 1980
C.from 1930 to 1957 D.less than fifty years
33.The Zuider Zee will be replaced by____________.
A.550,000 acres of land B.300,000 acres of fresh water
C.both A and B D.Neither A nor B
34.The article gives a measurement for the__________.
A.height of the barrier dam B.width of the barrier dam
C.width of the road along the dam D.height above sea level of the area on the land side of dam
35.Implied but not stated:
A.The first step in the project was a barrier dam.
B.The polder recipe was first used in this century.
C.Half of the Netherlands is below sea level.
D.There is more than one method of fighting salination.