题目内容
His work _____ have been completed; otherwise, he wouldn’t be enjoying himself on the beach.
- A.should
- B.shouldn’t
- C.can’t
- D.must
试题分析：考察情态动词用法。Should have done本应该做某事，实际上却未做；shouldn’t have done本不应该做某事，实际上却做了。Can’t have done不可能做了某事；must have done一定做了某事；本句的关键在于otherwise后面的句意。句意：他肯定完成了他的工作，要不然，他不会在海滩上玩得那么开心的。根据句意说明这是对过去发生的事情的有把握的肯定推测。故D正确。
考点：考察情态动词用法
点评：本题是高考必考考点，一定要牢记句型意思。must have done过去肯定做了某事。should have done 本应该做而实际未做。can’t have done 过去不可能做了某事；shouldn’t have done 本不应该做而实际做了。 need have done 本有必要做某事；needn’t have done 本没有必要做某事；注意没有 mustn’t have done的形式。
冲刺100分单元优化练考卷系列答案Humans have observed and explored the oceans since ancient times.But it wasn’t until the 19th century that the scientific study of oceans began.The first major scientific expedition,and the one that firmly established the field of oceanography,was the around-the-world voyage of H.M.S. Challenger.Setting out from England in 1872,the Challenger spent almost three and a half years gathering a wealth of information about seawater,sea life,and the ocean floor.Major oceanographic expeditions since then have included the South Atlantic voyage of the German ship Meteor in 1926 and the Deep-Sea Drilling Project from 1968 to 1983.Many individuals also have played important roles in advancing our understanding of oceans,beginning with Matthew Fontaine Maury in the mid-1800s;his work on oceanography and navigation led to a uniform system of weather reporting at sea.Since Maury’s time,oceanography has progressed rapidly.Early oceanographers had to contend themselves with tossing buckets overboard to see what they might haul in.Today’s oceanographers are equipped with space images,supercomputer models,and deep-sea robots that can crawl along the seafloor.As they set goals for the future,some oceanographers even dream of doing research in permanently manned stations on the bottom of the oceans.
【小题1】Which of the following statements is true?
| A．Humans didn’t explore the oceans until the 19th century. |
| B．Maury first established the field of oceanography. |
| C．Maury spent a lot of time in studying seawater,sea life,and the bottom of the ocean. |
| D．Many individuals also plays a very important part in advancing our understanding of oceans,such as Maury. |
| A．Four. | B．Three. | C．Five. | D．Two. |
| A．The process of the oceanography has stopped at one time. |
| B．Maury’s work on oceanography contributes a lot to weather reporting at sea. |
| C．Nowadays the equipment for studying the oceans needs improving,because it is out of date. |
| D．The expeditions in the past had great difficulty and made a lot of efforts in order to study the oceans. |
A. His early career
B. His return and Apple's growth
C. His moving back and its effect
D. His memory living on forever
E. Struggling hard for his career
F. Public recognition （承认）of his work
Steve Paul Jobs was an American businessman and widely recognized as a pioneer of the personal computer revolution（革命）. He was co-founder, chairman, and CEO of Apple Company. His death is a great loss to us. The following is some more information about him.
1.
After Apple's founding, Steve Jobs became a symbol of his company and industry. At the time of his resignation, and again after his death, he was widely described as a pioneer and genius perhaps one of the foremost in the field of business, creation and product design, and a man who had changed the face of the modern world, completely changed at least six different industries. His death was considered a loss to the world by commentators(评论家) across the globe.
2.
Memorial candles and iPads to Steve Jobs lie outside the Apple Store in Palo Alto, California. Apple has lost a creative genius, and the world has lost an amazing human being. Those who have been fortunate enough to know and work with Steve Jobs have lost a dear friend and an inspiring guide. Steve jobs leaves behind a company that only he could have built, and his spirit will forever be the foundation of Apple.
3.
As is still clearly remembered, it was not long before Steve Jobs left his office as CEO of Apple. But he remained at the company as chairman of the company's board. Hours after the announcement, Apple shares dropped by five percent in after-hour trading. The relatively small drop, when considering the importance of Steve Jobs to Apple, was associated with the fact that his health had been in the news for several years, and he was on medical leave since January 2011.
4.
Steve Jobs took a job as a technician at Atari company in California in 1974. He traveled to India in the summer of 1974. Seven months later, he returned to Atari and was assigned to create a circuit board for the game Breakout. With Wozniak, the founder of Atari, Steve Jobs began attending meetings of the Homebrew Computer Club where he got to know Edwin H. Land, the inventor of instant photography and founder of Polaroid Corporation, and modeled his career after him.
5.
Apple announced that it would buy NeXT for $429 million. The deal was finally made in late 1996, bringing Steve Jobs back to the company he co-founded. In order to concentrate Apple's efforts, Steve Jobs stopped a number of projects. With the purchase of NeXT, much of the company's technology found its way into Apple products. Under his guidance the company increased sales significantly with the introduction of the iMac and other new products. Since then, appealing designs and powerful branding have worked well for Apple.