单选题The amount of water used in the manufacturing process is enormous, but the amount wasted is ______.

单选题The number of members in the club ______ to two hundred.

单选题Sandy planned to take computer as her ______.

单选题Man has always wanted to fly. Some of the greatest men in history had thought about the problem. One of them, for example, was the great Italian artist, Leonardo Da Vinci. In the sixteenth century he made designs for machines that would fly, but they were never built. Throughout history, other less famous men had wanted to fly. An example was a man in England 800 years ago. He made a pair of wings from chicken feathers. Then he fixed them to his body and jumped into air from a tall building. He did not fly very far. Instead, he fell to the ground and broke every bone in his body. The first real steps took place in France, in 1783. Two brothers, the Montgolfiers, made a very large "hot air balloon". They knew that hot air rises. Why not fill a balloon with it? The balloon was made of cloth and paper. In September of that year, the King and Queen of France came to see the balloon. They watched it carry the very first air passengers into the sky. The passengers were a sheep and a chicken. We do not know how they felt about the trip. But we do know that the trip lasted eight minutes and that the animals landed safely. Two months later, two men did the same thing. They rose above Paris in a balloon of the same kind. Their trip lasted twenty-five minutes and they traveled about.

单选题When it comes to ______, I know nothing.

单选题______ the meeting himself gave his supporters a great deal of encouragement.

单选题She is often seen ______ in the library on Saturday morning. A. to read B. was reading C. reading D. reads

单选题Actually, information technology can ______ the gap between the poor and the rich.

单选题We asked the girl ______ a tractor if she could tell us how to get to the farm. A. to drive B. drove C. driving D. drive

单选题The deer was lucky that it just missed ______.

单选题A dream may come true if one works hard to ______ it.

单选题We don"t know why so many people in that region like to wear dresses of such ______ colors.

单选题The examination ______ next week. A. is held B. will hold C. is to be held D. will have been held

单选题I really appreciate ______ to help me, but I am sure that I can manage by myself.

单选题This medicine, taken on time three times a day, can be very ______ for a cold. A. healthy B. efficient C. active D. effective

单选题______ the rain, we should have had a pleasant trip to the countryside.

单选题Companies are struggling to find the right ______ between supply and demand, but it is no easy task.

单选题Effectively making oneself ______ is the first step of communication.

单选题(B) Someday in the future we may not need to have money in our pockets. Is life easier when people don"t need to carry any money? Is money heavy to carry? Is it safe to carry money? Maybe in the future each of us will have only one small plastic credit card (信用卡). We will use it to buy all the things we now buy with money. We will not need money to pay for things. Of course we may still have some of the same problems with cards that we now have with money. Sometimes we lose money. Maybe we will lose the card. People steal money. Maybe someone will take the card. Someone may even make a card that looks like our card. Since we can"t buy anything without our card, the credit card may be no better than currency. Is there something even easier to use than credit cards? All of us have a thumbprint (拇指纹 手印). No two thumbprints are the same. Maybe someday the government will keep people"s thumbprints with a number. No two people will have the same thumbprint or number. When we want to buy something, we will put our thumbs on a machine or computer. Each store or business will have one. Everyone"s thumbprint will be in the computers. It will be very difficult to lose our thumbprint. It will be difficult for someone to steal it or make one like it.

单选题She spoke so fast that it was difficult for her to make herself ______. A. understanding B. understood C. to understand D. be understood