单选题In recent years many countries of the world have been faced with the problem of how to make their workers more productive. Some experts claim the answer is to make jobs more varied. But do more varied jobs lead to greater productivity? There is evidence to suggest that while variety certainly makes the worker's life more enjoyable, it does not actually make him work harder. As far as increasing productivity is concerned, then variety is not an important factor. Other experts feel that giving the worker freedom to do his job in his own way is important and there is no doubt that this is true. The problem is that this kind of freedom cannot easily be given in the modern factory with its complicated machinery which must be used in a fixed way. Thus while freedom of choice may be important, there is usually very little that can be done to create it. Another important consideration is how much each worker contributes to the product he is making. In most factories the worker sees only one small part of the product. Some car factories are now experimentingwith having many small production lines rather than a large one, so that each worker contributes more to the production of the cars on his line. It would seem that not only is degree of worker contribution an important factor, therefore, but it is also one we can do something about. To what extent does more money lead to greater productivity? The workers themselves certainly think this important. But perhaps they want more money only because the work they do is so boring. Money just lets them enjoy their spare time more. A similar argument may explain demands for shorter working hours. Perhaps if we succeed in making their jobs more interesting, they will neither want more money, nor will shorter working hours be so important to them.

单选题March is the third month of ______.

单选题Bacon and scrambled eggs ______ the standard American breakfast. A. were B. are C. have been D. is

单选题He was a man of fine character in all points ______ he was rather timid.

单选题The newspaper's owner and editor______away on holiday.

单选题We have been told that the contract in question is _____ for one year starting from the

单选题______, none of us wanted to take a rest.

单选题Mrs. Edwards must have been ________.

单选题______ Pacific Ocean is ______ very large sea to the west of North and South America, and to the east of Asia and Australia. A. The; a B. A; the C. The; the D. A; a

单选题Some people seem to have a knack for learning languages. They can pick up new vocabulary, master rules of grammar, and learn to write in the new language more quickly than others. They do not seem to be any more intelligent than others, so what makes languages so much easier for them to learn? Perhaps if we take a close look at these successful language learners we may discover a few of the techniques that make language learning easier for them. First of all, successful language learners are independent learners. They do not depend on the book or the teacher. They discover their own way to learn the language. Instead of waiting for the teacher to explain, they try to find the patterns and the rules for themselves. They try to learn from their mistakes. Successful language learning is active learning. Therefore, they do not wait for a chance to use the language. Instead they look for such a chance. They will try anything to communicate. They are not afraid to repeat what they hear and to say strange things. They are willing to make mistakes and try again. When communication is difficult, they can accept information that is inexact or incomplete. It is more important for them to learn to think in the language than to know the meaning of every word. Finally, successful language learners are learners with a purpose. They want to learn the language because they are interested in the language and the people who speak it. It is necessary for them to learn language in order to communicate with these people and to learn from them. They find it is easy to practice using the language regularly because they want to learn it.

单选题It was this morning ______ my grand father helped Mike mend his bike this morning.

单选题Sally: Have you received the email from the International Students Office? Kelly: ______. So I'm not sure. What's the matter?

单选题There was such a long queue outside the China Pavilion that we ______ gave up.

单选题Out of all the students: who enroll in a massive open online course (MOOC), only about 5 percent complete the course and receive a certificate accomplishment This statistic is often cited as evidence that MOOCs are fatally flawed (缺陷的) and offer little educational value to most students. Yet more than 80 percent of students who fill out a post-course survey say they met their primary objective. How do we look at these two facts? We"re used to focusing on completion rates in higher education, but they"re not the only—or even the most meaningful—indicator of engagement in open online courses. With no cost to enroll, no punishment for dropping out, and little reward for actually earning a certificate, MOOCs are fundamentally different from traditional classes—and students use them in fundamentally different ways. Data from more than 1.8 million students enrolled in 36 MOOCs offered by the University of Pennsylvania show that students treat MOOCs as a buffet (自助餐), sampling the material according to their interests and career goals. Some are curious about the subject matter and just watch one or two video lectures; others use the discussion forums to connect with their intellectual peers around the world. Of all enrolled students, nearly 60 percent watch at least one video, complete at least one assignment, or post at least once in a forum. So focusing on the tiny fraction of students who complete a MOOC is misguided. The more important number is the 60 percent engagement rate. Students may not finish a MOOC with a certificate of accomplishment, but the courses nonetheless meet the educational goals of millions.

单选题Why do you stand and watch the milk __________ over?

单选题A child"s first five years is important as far as learning is ______.

单选题This company is closing up, so lots of workers will be laid ______.

单选题Doctors have said that as many as 50 percent of patients don’t take medicine directed.