单选题The doctor (told) him that he (should take) this medicine (one) pill at (one) time.

单选题It was not until she has arrived home ______ remembered her appointment with the doctor

单选题We ______ as well leave here today. A. must B. might C. need D. can

单选题Eye contact is important because wrong contact may create a communication ______.

单选题______ he come tomorrow, I should give him the dictionary he needs.A. HadB. ShouldC. WereD. Would

单选题{{B}}Passage 3{{/B}} All the useful energy at the surface of the earth comes from the activity of the sun. The sun heats and feeds creatures and mankind. Each year it provides men with two hundred million tons of grain and nearly ten million tons of wood, coal, oil, natural gas, and all other fuels are stored energy from the sun. (80) {{U}}Some was collected by this season's plants as carbon compounds. Some was stored by plants and trees ages ago. {{/U}}Even waterpower derives from the sun. Water turned into vapor by the sun fails as rain. It courses down the mountains and is converted to electric power. Light transmits only the energy that comes from the sun's outer layer, and much of this energy that is directed towards the earth never arrives. About nine tenths of it is absorbed by the atmosphere of the earth. In fact, the earth itself gets only one half millionth of the sun's entire output of radiant energy.

单选题Because the United States is not surrounded by many other nations, some Ameri-cans tend to ______ the rest of the world.

单选题During the teen-age years, one should learn to ________

单选题Trees are useful to man in three important ways: they provide him with wood and other products; they give him shade; and they help to prevent droughts and floods. Unfortunately, in many parts of the world, man has not realized that the third of these services is the most important. In his eagerness to make money from trees, he has cut them down in large numbers, only to find that without them he has lost the best friends he had. And besides, he is usually too careless to plant and look after new trees. So the forests slowly disappear. This does not only mean that man will have fewer trees. The results are even more serious: for where there are trees, their roots break up soil—allowing the rain to sink in—and also bind the soil, thus preventing it from being washed away easily; but where there are no trees, the rain falls on hard ground and flows away, causing floods and carrying away the rich top-soil. When all the top-soil is gone, nothing remains but worthless desert. Two thousand years ago a rich and powerful country cut down its trees to build warships, with which to gain itself an empire. It set up the empire but, without its trees, its soil became poor and it grew weak. When the empire fell to pieces, the home country found itself faced with floods and starvation.

单选题A special _____ should be laid on the necessity of team cooperation.

单选题After an hour or two, I ______ a man riding a pony clown the street.

单选题After stopping for a few minutes, the bus moved ______ to its next stop.

单选题While shopping , people sometimes can"t help persuading into buying something they don"t really need .

单选题—Which day do you think is all right to our next meeting? —You make ______ . ______day is all the same to me.

单选题It is said that he ______ murder. A. committed B. conducted C. executed D. emitted

单选题(The) famous scientist, (in his honor) a dinner party (will be held) tonight, (is to) arrive soon..A．The B．in his honor C．will be held D．is to

单选题My parents bought me some books, but ______ was interesting.

单选题______, he felt tired out after the long journey for eight hours.

单选题While he was climbing the high mountain, he had his leg ______. A. broke B. break C. broken D. breaking