I'm afraid that Rare Earth(稀土) will if we continue to waste it．
A. run out B. break out C. come down D. fall down
九年级英语单项填空中等难度题
I'm afraid that Rare Earth(稀土) will if we continue to waste it．
A. run out B. break out C. come down D. fall down
九年级英语单项填空中等难度题查看答案及解析
(2016●南通市)I'm afraid that this type of energy will if we continue to waste it.
A. run out B. break out C. come down D. fall down
九年级英语单选题中等难度题查看答案及解析
I'm afraid that this type of energy will if we continue to waste it．
A．run out B．break out C．come down D．fall down
九年级英语单项填空中等难度题查看答案及解析
I’m afraid we will have to call the police if you ____ breaking into the car.
A. try on B. put on C. base on D. insist on
九年级英语单项填空中等难度题查看答案及解析
If the population of the earth continues to increase , there will not be enough resources (资源) left to keep life on the planet. We will use up all the oil that drives our cars sooner or later .One possible way to work out the problem, has recently been suggested by an American scientist, Professor Carl Sagan.
Sagan believes that before the earth’s resources are completely used, it will be possible to change the atmosphere of Venus(金星) and create a new world almost as large as Earth itself. The difficulty is that Venus is much hotter than the earth and there is only a little water there.
Sagan suggests that algae organisms(海藻组织) can live in very hot or cold temperatures and at the same time produce oxygen. They should be bred(养殖) in conditions similar to those on Venus. When this has been done, In a short time, the algae will break down the carbon dioxide into oxygen and carbon.
When the algae have done their work, the atmosphere will become cooler, but before man can set foot on Venus it will be necessary for the oxygen to produce rain. The surface of the planet will still be too hot for man to land on but the rain will finally fall and in a few years something like earth will be reproduced on Venus.
1.The population growth on Earth will cause the lack(缺乏) of _________.
A.food B.oil C.space D.resources
2.What is one of the difficulties for the human race to live on Venus?
A.The shortage of the algae B.The shortage of carbon
C.The much hotter weather D.The much cooler weather
3.Which of the following statements about the algae is NOT true according to the passage?
A.It can live in very hot temperatures. B.It can live in very cold temperatures.
C.It can break down the carbon dioxide. D.It can provide enough food for man.
4.This passage is mainly about __________.
A.the possibility of living on Venus B.the population of the earth
C.the American scientist Sagan D.the weather of other planets
九年级英语阅读单选困难题查看答案及解析
—Shall we tell Jim about the change of the timetable right now?
—I’m afraid you ____ so that he will not be late for the meeting.
A. need B. must C. can D. may
九年级英语单选题中等难度题查看答案及解析
---Shall we meet and discuss the problem at 9 a.m.?
---I'm afraid I will be busy at that time. Let's make it time.
A. other’s B. the other C. another D. other
九年级英语单项填空中等难度题查看答案及解析
If you continue to use old-fashioned (过时的) language, young people will ________that you haven’t kept up with today’s thinking and knowledge.
A. consider B. correct
C. control D. Create
九年级英语单项填空中等难度题查看答案及解析
We will have no water to drink _________ we don’t protect the earth.
A. until B. if C. unless
九年级英语单项填空简单题查看答案及解析
1.If we don’t protect the earth, we will l__________ our home.
2.--Where are you going to spend your holiday, Mary?
--I have no idea. But I plan to go a__________ because I want to make some foreign friends.
3.We’re tired of working inside. Let’s go out to breathe some f__________ air.
4.The little girl is badly ill. She is too w__________ and needs some more rest to get better.
5.A__________ it rained heavily yesterday, he still arrived at school on time yesterday.
6.My d__________ is to be a writer and I never give it up, so I must study hard to make it.
九年级英语单词拼写困难题查看答案及解析