The reasons for the population decrease covers as follows except______.A．later marriageB．late pregnancyC．national family planning policyD．China

What is the 'biggest city in the world? That is, (21) city has the largest population? This seems like (22) question to answer, but actually it isn't.

It's actually rather difficult to say which cities (23) the largest. There are two reasons for this difficulty. First of all, it isn't easy to determine a city's boundaries, that is, where a city ends. Nowadays, nearly all cities have a large (24) area around them. So when we talk about the population of a city, we often mean the population of the whole metropolitan area around the city. That means that it's difficult to determine what the population of a city is because it's difficult to define what a city is.

The second reason that it is difficult to 25 the population of different cities is this: it is almost impossible to get (26) about the population of all cities for the same year. For example, we might get an estimate of New York's population in 1979 and an (27) of Mexico City's population in 1981. So we real ly can't compare the numbers because the information is for (28) different years. And the population of cities changes rather quickly, especially in some cases. For example, the population of Jakarta, Indonesia, may increase by 5% each year, so the population figure will change rather quickly.

So we can say that these are our two (29) for comparing the populations of cities: one, it's difficult to determine the (30) of a city, and two, it is difficult to get accurate information.

21. A. what

B. which

C. where

D. how

EXTENDED FAMILY In an extended family, all the people share one household. Apart from parents and children, there may be other family members grandparents, aunts, uncles, cousins, etc. That is to say, a large family may have more than two generations, and often there are more than two adults from different generations of a family. The family members live together for many reasons. They may help to bring up children or to take care of an ill relative. They may also help with saving money. Sometimes children are brought up by their grandparents, for their parents have died or can never take care of them. Many grandparents look after the children,particularly when both parents are busy working. This large family is called extended family. It can be found all over the world. The number of these families has increased by 40 percent in the past ten years. Most of such families live happily together.

1. In an extended family, people live in different houses.()

2. An extend family includes at least three generations.()

3.In an extended family, children are looked after by their grandparents because their parents are traveling around.()

4. Extended families can be found all over the world.()

5. Children can live happily with their parents and grandparents.()

In general, attempts to smooth out period to period resources will _____ the scheduled time and _____ project costs.

A.Increase, decrease.

B.Increase, increase

C.Increase, increase or decrease.

D.Decrease, decrease.

E.Decrease, increase.

Part A

51. Directions:

You are planning to ask your friend to join an outing. Express your idea clearly as follows:

1) details about what you are going to do;

2) when and where you will go out.

You should write no less than 100 words and on ANSWER SHEET Ⅱ. Do not sign your own name at the end of the letter.

You do not need to write the address.

In some societies people want children for what might be family reasons.

The world’s population continues to grow. There now are about 4 billion of us on earth. That could reach 6 billion by the end of the century and 11 billion in a further 75 years. Experts have long been concerned about such a growth. Where will we find the food, water, jobs, houses, school and health care for all these people?

A major new study shows that the situation may be changing. A large and rapid drop in the world’s birth rate has taken place during the past 10 years. Families generally are smaller now than they were a few years ago. It is happening in both developing and industrial nations.

Researchers said they found a number of reasons for this. More men and women are waiting longer to get married and are using birth control devices and methods to prevent or delay pregnancy. More women are going to school or working at jobs away from home instead of having children. And more governments, especially in developing nations, now support family planning programs to reduce population grow.

China is one of the nations that have made great progress in reducing its population growth. China has already cut its rate of population growth by about half since 1970.

Each Chinese family is now urged to have no more than one child. And the hope is to reach a zero population growth with the total number of births equaling the total number of deaths by the year 2000.

Several nations in Europe already have fewer births than deaths. Experts said that these nations could face a serious shortage of workers in the future. And the persons who are working could face much higher taxes to help support the growing number of retired people.

1. The world’s population could reach ____________.

A. 6 billion in 75 years

B. 11 billion in 2075

C. 11 billion by the end of this century

D. 600 million in 15 years

2. Which of the following is true?

A. The world’s birth rate is higher than ten years ago.

B. There has been a slower population growth in the past ten years.

C. Families are as large as before.

D. Birth control has been well practiced in all nations.

3. By the year 2000, the number of births and the number of deaths in China will _______.

A. be greatly different

B. drop a great deal

C. be equal

D. become much larger

4. According to the essay, China’s population control ________.

A. is not quite successful

B. should be considered a big success

C. is far from being successful

D. is a complete failure

5. It may happen in the future that the people who are working in Europe will have to pay much higher taxes because___________.

A. more and more children will be born

B. the number of retired people will become ever larger

C. fewer and fewer children will be born

D. they will be making a lot of money

Management reserves are normally defined as a % of the total budget. As a project progresses, the project manager wants the $ value of management reserve to _____, whereas the customer wants the management reserve to _____.

A . Increase, increase.

B . Increase, decrease.

C . Decrease, decrease.

D . Decrease, increase.

E . Remain the same, return to customer.

An increase in rotor clearances in a rotary pump will ______.

A.increase discharge pressure

B.decrease pump capacity

C.decrease pump cavitation

D.decrease reaction ring clearance