--The mistake_____, I had been more careful.
---But you weren’t at that time.
A. might have avoided B. would avoid
C. would be avoided D. might have been avoided
高二英语单项填空困难题
--The mistake_____, I had been more careful.
---But you weren’t at that time.
A. might have avoided B. would avoid
C. would be avoided D. might have been avoided
高二英语单项填空困难题查看答案及解析
If you want to do the experiment again, you had better be more careful ________ you made a mistake.
A. when B. why C. where D. that
高二英语单项填空中等难度题查看答案及解析
-The terrible accident might not have happened had the driver been more careful.
--But he _____.
A．wasn’t B．didn’t C．hadn’t D．doesn’t
高二英语单项填空中等难度题查看答案及解析
Had I been a little more careful，I such a foolish mistake.
A．won't make B．hadn't made
C．didn't make D．wouldn't have made
高二英语单项填空中等难度题查看答案及解析
I _______ such a foolish mistake if I had been a little more careful.
A. wouldn’t make B. wouldn’t have made
C. hadn’t made D. didn’t make
高二英语单项填空简单题查看答案及解析
. I_______such a foolish mistake if I had been a little more careful.
A. wouldn’t make B. hadn’t made
C. wouldn’t have made D. didn’t make
高二英语单项填空简单题查看答案及解析
Look! What you've done! You _______ more careful.
A. may be B. had to
C. should have been D. would be
高二英语单项填空中等难度题查看答案及解析
In the exam, the _________ you are, __________ mistakes you will make.
| A．more careful; the fewer | B．more careful; less | C．careful; little | D．careful; few |
高二英语单项填空简单题查看答案及解析
If I had been a little more careful, I _______the wallet behind.
A. won't leave B. hadn't left C. didn't leave D. wouldn't have left
高二英语单项填空中等难度题查看答案及解析
The 2012 London Olympics had enough problems to worry about. But one more has just been added --- a communications blackout caused by solar storms.
After a period of calm within the Sun, scientists have detected the signs of a fresh cycle of sunspots that could peak in 2012, just in time for the arrival of the Olympic torch in London.
Now scientists believe that this peak could result in vast solar explosions that could throw billions of tons of charged matter towards the Earth, causing strong solar storms that could jam the telecommunications (通信) satellites and interact links sending five Olympic broadcast from London.
“The Sun’s activity has a strong influence on the Earth. The Olympics could be in the middle of the next solar maximum which could affect the functions of communications satellites,” said Professor Richard Harrison, head of space physics at the Rutherford Appleton Laboratory in Oxfordshire.
At the peak of the cycle, violent outbursts called coronal mass ejections (日冕物质抛射) occur in the Sun’s atmosphere, throwing out great quantities of electrically-charged (带电) matter. “A coronal mass ejection can carry a billion tons of solar material into space at over a million kilometers per hour. Such events can expose astronauts to a deadly amount, can disable satellites, cause power failures on Earth and disturb communications,” Professor Harrison added. The risk is greatest during a solar maximum when there is the greatest number of sunspots.
Next week in America, NASA is scheduled to launch a satellite for monitoring solar activity called the Solar Dynamics Observatory (SDO), which will take images of the Sun that are 10 times clearer than the most advanced televisions available.
The Rutherford Appleton Laboratory helped to make the high-tech cameras that will capture images of the solar flares (太阳耀斑) and explosions as they occur.
Professor Richard Holdaway, the lab’s director, said that the SDO should be able to provide early warning of a solar flare or explosion big enough to affect satellite communications on Earth “If we have advance warning, we’ll be able to reduce the damage. What you don’t want is things switching off for a week with no idea of what’s caused the problem,” he said.
1.
The phrase underlined part in paragraph one most probably refers to _______ during the 2012 Olympics.
A. the state of the Olympic torch being put out
B. the failure of broadcasting systems
C. the transportation breakdown in London
D. the destruction of weather satellites
2.
What can be inferred about the solar activity described in the passage?
A. The most deadly matter from the corona falls onto Earth.
B. The solar storm peak occurs in the middle of each cycle.
C. It takes several seconds for the charged matter to reach Earth.
D. The number of sunspots decreases after coronal mass ejections.
3.
Which of the following might be the best title of the passage?
A. Solar Storms: An Invisible Killer
B. Solar Storms: Earth Environment in Danger
C. Solar Storms: Threatening the Human Race
D. Solar Storms: Human Activities to Be Troubled
高二英语阅读理解简单题查看答案及解析