单选题She doesn't talk much, but what she says makes______.

单选题They couldn't ______ him of his mistake.

单选题Every country has secret services to help protect it against serious threats from terrorists, major criminals or even from other countries. People who threaten to harm a country always plot in secret, so the intelligence agencies have to work in secret to find out what is being planned before it happens, so that it can be prevented. They do that in many different ways—by secretly listening to their targets talking on the phone, by planting microphones to overhear meetings, by watching the targets as they move from place to place and by recruiting some of the targets to act as double agents to report on what is going on. For most of my career I worked in one of the UK"s three intelligence services, MIS, the domestic security service. I first joined in the 1970s, in the middle of the Cold War, when the war was divided into two armed camps, the Soviet Union and its allies on the one side and Western Europe, America and their allies on the other. The Cold War never became a fighting war. It was an intelligence war, with intelligence officers from both sides trying to find out what the other side was doing, what kind of weapons they had, when and if they might start a war and what their plans were. Both sides were secretly working in each other"s countries. Nowadays one of the biggest threats to the world, comes from terrorists. Intelligence officers from many different countries are working together to find out who they are, where they are and what they are planning. Today"s MIS officers get their intelligence in much the same way as we did during the Cold War, but their task is even more difficult and urgent because most terrorists want to kill people. Many terrorist attacks that are planned and prepared never happen, and we never know anything about them because the intelligence services find them out and prevent them.

单选题The time will come ______ man can fly to outer space freely.

单选题Schools should teach our kids various subjects, and moreover teach them how to ______ right from wrong. A. run B. take C. tell D. put

单选题It ______ last night. But I am not sure.

单选题You are wanted______the phone. It might be your girl friend calling.

单选题Student A: May I borrow your computer this afternoon? Student B: I'm sorry, but I have to finish my term paper with it. Student A: ______

单选题The goals ______ which he had fought all his life no longer seemed important to him. A. after B. for C. with D. at

单选题______explain it to him, he still didn't understand.A. Hard as I tried to B. As I tried hard toC. Hard I tried to D. Tried as I hard to

单选题You"d rather work than play, ______?

单选题You ______ yesterday if you were really serious about the job.

单选题(Let's not) waste time on matters (of no important). We have other (vital) problems to (deal with).

单选题Betty: I'd like to work here during this summer holiday. ______ Nancy: Fill in the application and give it back to me.

单选题I (remember) clearly (to return) the book to him last Wednesday, but now he (says) that (I didn't).

单选题The dog has always been considered man"s best friend. Always noted for being particularly faithful in watching over children, he also has his place by the fireside, in the cow pasture, on the sheep range, and beside the hunter in forest or blind. He is easy to train, works hard, and often performs astonishing feats. And in the frozen polar regions he was once the principal motive power, before being largely displaced by the plane and helicopter. Because he howls or whines in the presence of impending death, the dog was once thought to have supernatural powers and believed to be capable of seeing gods and ghosts invisible to men. Actually, the basis for these beliefs lies in the hound"s sensitivity to people"s feelings and his superior hearing ability and sense of smell, which enable him to detect signs hidden from human observation. His record of saving lives is outstanding, for he often gives warning of fire and other dangers not noticed by his master. The dog"s major contribution, however, has been to medical research. Both his diet and his structure are comparable to those of the human being, and so he has been the subject of countless experiments. Open- heart surgery has been made possible largely because of the dog. But his sacrifice has repaid his own species as well by safeguarding it from rabies, distemper, and other diseases.

单选题John didn"t want to risk ______ wet as he had only one suit.

单选题Doctors believe that lung cancer is caused ______ by smoking too much.

单选题—Have you got used to the Chinese food, Frank? —Yes. But I don't like ______ when a Chinese host keeps serving me the food I don't like.