阅读理解。 Which country is the biggest  country in the world? Well,  look at the map and you'll  know it is Russia. Then the following are Canada, China, the USA and Brazil. Among them, China has the largest number of people , with  the population reaching 1.3 billion. Canada has the longest coastline.  It is long enough to go around the earth six times. What is the largest island in the world, do you know?  Is that Hawaii? No, it is much smaller than the largest island in the w orld-Greenland.Greenland is to the northeast of Canada. 81% of  its land is covered with ice.  It is very cold  there,  so there are only  about 56,000  people living on the land. 1.  What is the fifth largest country in the world? A. China B. America C. Brazil D. Canada 2.   A. Which country has the largest number of people? A. Russia B. Canada C. China D. America 3.   How many times c an Canada's coastline go around the earth? A. Five times B. Six times C. Seven times D. Four times 4.  What is the largest island in the world? A.  H awaii B. Greenland C. Taiwan D. Hainan Island 5.  How much of Greenland's land is covered with ice? A. 80% B. 81% C. 18% D. 13%