单选题As the population increases and human needs expand, we must take care not to _____ all of our natural resources at once.A eraseB minimizeC maximizeD exhaust

We assign human and non-human resources in the _____ phase of the budget.

A . conceptual

B . planning

C . development

D . implementation

E . close-out

We should ______ our agents of any price increases.

(A) notify

(B) tell

(C) notice

(D) warn

The purpose of the author in writing this passage is

A． that, by banning the violent sports, we human beings can improve ourselves

B． that, by banning the dangerous sports, we can improve the law

C． that we must take positive steps to improve social welfare system

D． to show law is the main instrument of social change

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

77 We assign human and non-human resources in the _____ phase of the budget.

A. conceptual

B. planning

C. development

D. implementation

E. close-out

Water is the __46___ of all the things we eat and drink . Not many people understand this but __47____ quite true . The human body can go without ___48___ for a long time . We’ve got many examples for this . Yet two __49___ three days without water can usually make people __50____ . Man can’t live __51____ water .

Many people don’t understand how ___52__ water the human body needs __53___ work well , and many people , especially young people , do not drink enough , ___54__ in very hot weather . Our body has mostly water , about 65% to 75% . That is to say about two thirds of our body is water . When we do sports , some of the water will get away from our body . __55 _ we don’t drink some water , we won’t have enough water． And if we don’t have enough water , we’ll feel tired and many of us will get ill . So you know how important water is to us .

46.___________

( )46. A. important

B. most important

C. more important

D. different

A、of course

B、above all

C、for sure

D、not at all

We are pleased to note that you wish to expand our relationship ,()suggest that we consider the matter of agency later .

A. and

B. but

C. however

D. nevertheless

Today we know more about ______. We’re better at preventing illness.

A: medicine

B: pollution

C: environment

D: population