I shall never forget those days ______ I spent with the earthquake victims(受害者), _____ has a great effect on my life.

   A. that; which    B. when; that     C. which; that    D. when; who

練習(xí)冊(cè)系列答案
相關(guān)習(xí)題

科目:高中英語 來源: 題型:閱讀理解

Sometime early in the next century, human beings will move to Mars.They will live there for about a year, and then will be replaced with another group of pioneers.Building the base on Mars will advance our knowledge of the solar system and aid in our understanding of the earth.

We already know that Mars resembles the earth in many aspects: general size, presence of water, length of day, range of temperatures.These resemblances have caused many people to consider a centuries-long project: to terraform Mars.Terraforming means altering a planet’s surface so that Earth’s life forms can survive there.This concept, previously found only in science fiction is now being seriously considered by scientists.

Terraforming Mars is theoretically simple: add nitrogen and oxygen to the atmosphere; pump water to the surface; and add the earth’s plants and animals in the order in which they developed on Earth.But it will take at least 300 years.

Some people think that such a project is too huge for humans to undertake, but there are very good reasons to make the attempt.The earth now contains some 6 billion people, and no one has any idea of how many humans the earth can support.Our very existence and numbers are threatening many other species.We also have had some experience with terraforming our own planet: altering the landscape, the atmosphere and the climate.Currently terraforming Earth has become a wiser activity as we try to control global warming, air and water pollution, and preserve some natural living places.

Small as the possibility of such a project is, it is not impossible.Even if earth-bound societies come and go in the next 300 years, the project can continue through the work of the Mars settlers without the need for constant backing from the earth.

The future existence of all the people in our world may very well depend upon our ability to terraform Mars.

What would be the best title for this passage?

      A.Terraforming Mars.       B.Saving the Earth.

      C.Travelling to Mars.       D.A Newly-found Place.

What does the underlined word “altering” mean in the second paragraph?

      A.Warming.         B.Changing.         C.Planting.          D.Building.

According to the passage the main purpose of terraforming Mars is to _____.

      A.do some scientific research work   

       B.find out its similarity to Earth

      C.a(chǎn)void the dying away of many other species   

       D.find on Mars living place for the increasing human beings

The main reason for causing many people to consider terraforming Mars is that _____.

       A.there are some resemblances between Earth and Mars

       B.terraforming Mars is theoretically simple

       C.we have had some experience with terraforming our own planet: Earth    

       D.the development of science and technology is very rapid

查看答案和解析>>

科目:高中英語 來源: 題型:

He arrived home very late last night, __________in the early hours this morning.

       A.or else        B.or rather            C.rather than           D.more than

查看答案和解析>>

科目:高中英語 來源: 題型:

 Now the world’s attention ______ the stocking markets, as they have great influence in the world’s economy.

   A. is fixing on             B. has fixed on        C. is being fixed on         D. had been fixed on

查看答案和解析>>

科目:高中英語 來源: 題型:

The company has just launched an advertising campaign to ____ their newly produced bicycles.

A. advocate                       B. urge               C. motivate                D. promote

查看答案和解析>>

科目:高中英語 來源: 題型:

. I walked out of the cinema, _____ I’d never come back to this hell.

A. determining   B. determined    C. to determine   D. determine

查看答案和解析>>

科目:高中英語 來源: 題型:

–How is your trip to Canada?

—Good, but the hotel we stayed in is ______but satisfactory.

A. something         B. anything            C. nothing             D. everything

查看答案和解析>>

科目:高中英語 來源: 題型:

A large number of people in the city _______ to watch yesterday’s match against Korea.

A. turned on        B. turned in         C. turned around     D. turned out

查看答案和解析>>

科目:高中英語 來源: 題型:

 China understands the situation and needs of underdeveloped countries on the issue of climate change and urges developed countries to support them______ technology and finance. 

A. in spite of          B. owing to           C. regardless of          D. in terms of 

查看答案和解析>>

同步練習(xí)冊(cè)答案