50.A. uniform B. hairstyle C. schoolbag D. playground

51.A. the teachers B. the students C. the public D. the adults

52.A. silence B. sit C. seat D. stand

53.A. having B. getting C. putting D. leaving

54.A. however B. but C. even D. still

55.A. which B. as C. that D. so

第三部分　阅读理解(共20小题;每小题2分，满分40分)

阅读下列短文，从每篇短文后所给各题的四个选项(A、B、C和D)中，选出最佳选项。

A

Making pulp (纸浆) and paper is a traditional industry in Canada. According to the Canadian Pulp and Paper Association，Canada supplies 34% of the world’s wood pulp and 49% of its newsprint paper. If these paper products could be produced in some other way，Canadian forests could be left. Recently，a possible way of producing paper has been suggested by agriculturalists and environmentalists: a plant called hemp (麻).

Hemp has been grown for a long time. It produces fiber which can be made into paper，fuel，oil，food and rope. For centuries，it was very important to the economies of many countries because it was used to make big ropes used on sailing ships. The worldwide trading network would not have been possible without hemp. Nowadays，ships’ ropes are usually made from wire or fibers，but scientists are now suggesting growing hemp. In fact，four times as much paper can be produced from land using hemp rather than trees，and many environmentalists believe that the large-scale growing of hemp could reduce the pressure on Canada’s forests.

However，there is a problem: hemp is illegal in many countries of the world. This plant，which is related to the plant from which a drug called marijuana (大麻毒品) is produced，is very useful for fiber，rope，oil and fuel. In the late 1930s，a movement to ban the drug marijuana began，resulting in the banning of the growing not only of the plant used to produce the drug，but also of the commercial fiber producing hemp plant. In fact，the drug marijuana cannot be produced from the hemp plant，since it doesn’t contain the active ingredient (成分)in the drug. In recent years，many people try to make it legal to grow the plant and sell the fiber for production.

56.Why is pulp and paper production important to Canada?

A.Canada needs to find a way to use all its spare wood.

B.Canada publishes a lot of newspapers and books.

C.Pulp and paper export is a major source of earning money for Canada.

D.Hemp is a traditional plant of Canada.

57.In the past worldwide trade，the plant hemp was used as ________.

A.a material for ships’ ropes

B.a very rewarding export

C.fuel for ships

D.food for sailors