The accident have been caused by a dog runnin...

The accident 　　　　 have been caused by a dog running across the road, but we don’t know for sure.

A. might　　 B. should

C. will　　 D. must

高三英语单项填空困难题查看答案及解析

The accident________caused by a dog running across the road, but we don’t know for sure.

A．could have been                   B．must have been

C．might have                        D．should have

高三英语单项填空中等难度题查看答案及解析

Many of the world's pollution problems have been caused by the crowding of large groups of people into the cities．Supply for the needs of the people leads to further　 　 　　 by industry．If the rapid increase of world population continues at the present rate, there may be much greater　　 　 　 to human beings．

Some scientists speak of the increase in numbers of people as "population pollution''．

About 2,000 years ago, the world population was about 250 million．It　　 　 　　 a billion in 1850．By 1930 the population was two billion．It is now six billon．It is　　 　 　 to double by the year 2020．If the population continues to grow at the same rate, there will be 25 billion people in the　　 　 　　 a hundred years from now．

Man has been　　 　 　 the earth's resources more and more　　 　 　　 over the past years．Some of them are almost gone．Now many people believe that man's greatest problem is how to control the　　 　 　　 of the population．The material supplies in the world will be far from enough to　　 　 　 the human population if the present rate of increase continues．

There is already over-crowding in many cities and starvation in some countries．Many people believe that human survival in the future 　 　 on the answer to the question．

1.A．progress　      B．pollution    　　 C．education　     　　 D．production

2.A．danger    B．harm    C．benefit    D．hardship

3.A．got    B．took    C．brought    D．reached

4.A．suggested　　 B．hoped    C．expected    D．said

5.A．world    B．country　     C．star　     D．end

6.A．discovering[　 B．using    C．digging    D．destroying

7.A．seriously　　 B．dangerously　 C．rapidly    D．steadily

8.A．existence　　 B．start    C．growth    D．birth

9.A．increase　　 B．starve    C．construct 　　　　　　 D．support

10.A．depends　 B．agrees    C．saves    D．passes

高三英语完型填空中等难度题查看答案及解析

Many of the world’s pollution problems have been caused by the crowding of large groups of people into the cities. Supply for the needs of the people leads to further 1 by industry. If the rapid increase of world 2 continues at the present rate, there may be much greater 3 to human beings. Some scientists 4 of the increase in numbers of people as “population pollution（人口公害）”.

About 2, 000 years ago, the world population was about 250 million. It 5a billion in 1850. By 1930 the population was two billion. It is now six billion. It is 6to double by the year 2020. If the population 7 to grow at the same rate, there will be 25 billion people in the 8 a hundred years from now.

Man has been 9   the earth’s resources more and more 10   over the past years. Some of them are almost gone. Now many people believe that man’s 11   problem is how to control the 12   of the population. The material supplies in the world will be far from enough to 13  the human population if the present rate of increase continues. There is already over-crowding（过分拥挤）in many cities and 14  in some countries. Many people believe that human survival（生存） in the future 15  on the answer to the question.

1.                A．progress        B．pollution        C．education D．production

2.                A．agriculture      B．industry        C．environment   D．population

3.                A．danger         B．harm           C．benefit   D．hardship

4.                A．dream         B．approve        C．rid  D．speak

5.                A．got            B．took           C．brought  D．reached

6.                A．suggested       B．hoped          C．expected D．said

7.                A．continues       B．fails            C．tries D．means

8.                A．world          B．country         C．star  D．end

9.                A．discovering      B．using           C．digging   D．destroying

10.               A．seriously       B．dangerously     C．rapidly    D．steadily

11.               A．greatest        B．easiest         C．lightest    D．simplest

12.               A．existence       B．start           C．growth    D．birth

13.               A．increase        B．decrease       C．report D．support

14.               A．discussion      B．starvation       C．construction    D．argument

15.               A．depends        B．agrees         C．saves D．passes

高三英语完型填空中等难度题查看答案及解析

We apologize for any inconvenience you _______ have been caused by the delay of the flight.

A. may                    B. would                C. must                     D. need

高三英语单项填空中等难度题查看答案及解析

We apologize for any inconvenience you _______ have been caused by the delay of the flight.

A．may              B．would            C．must             D．need

高三英语单项填空简单题查看答案及解析

I’m not sure of the reason for the dog’s illness, but it ____ by eating too much.

A. may have been caused　　 B. need have been caused

C. should have been caused　　 D. must have been caused

高三英语单项填空中等难度题查看答案及解析

Experts have been warning ___ of the health risks caused by passive smoking.

A.at a time                             B.at one time

C.for some time                         D.for the time

高三英语单项填空中等难度题查看答案及解析

Experts have been warning___of the health risks caused by passive smoking.

高三英语单项填空中等难度题查看答案及解析

Glancing ______ his shoulder, Eric could see the dog was running after him．

A．over             B．across            C．through           D．onto

高三英语单项填空中等难度题查看答案及解析