单选题Tom regretted (to blame) his sister (for) the mistake, for he later found it was his own fault.A. to blame B. for C. later D. own

单选题No sooner __________ than the jeep started off．

单选题The period during (when) people (learned to) smelt iron is (called) (the) Iron Age.A. whenB. learned toC. calledD. the

单选题Louis: Bert, our company is not allowed smoking. You must smoke outside. Bert: ______I just want to refresh myself.

单选题Margaret spent all the evening talking about her latest book ______ none of us had ever heard.

单选题I (　　)on the door for ten minutes now without an answer.

单选题(Look at) the beautiful (flowers) here! (How) wonderful they (are smelling).

单选题The growth of a child is influenced by a number of factors, __________ are beyond our control.

单选题The old lady was sitting in the _____ of a large tree looking very relaxed and happy.

单选题Would the news ______ he failed to pass the exam bother you? A. which B. that C. of which D. on which

单选题After the experiment was over, the man might have felt that ______

单选题These wild flowers are so special that I would do ______ I can to save them.

单选题He will come back ______ next month.

单选题I had just stepped out of the bathroom and was busily drying myself with a towel ______ I heard the steps.A. whileB. whenC. sinceD. after

单选题The writer used an Arabic story to prove that ______.

单选题Customer: Could you find these books for me? Seller: Sure. Let me have a look at your list. Customer: ______

单选题{{B}}Passage 18{{/B}} We all know that it is possible for ordinary people to make their homes on the equator (赤道), although often they may feel uncomfortably hot there. Millions do it. But as for the North Pole (北极)-we know that it is not only a dangerously cold place, but that people like you and me would find it quite impossible to live there. At the present time only the scientists and explorers can do so, and they use special equipment. Men had been traveling across and around the equator on wheels, on their feet or in ships for thousands of years; but only a few men, with great difficulty and in very recent time, have ever crossed the ice to the North Pole. So it may surprise you to learn that, when traveling by air, it is really safer to fly over the North Pole than over the equator. Of course, this is not true about landings in the polar region (which passenger planes do not make), but the weather, if we are flying at a height of 5, 000 meters above the Pole, is a delight. At 4, 000 meters and more above the earth you can always be sure that you will not see a cloud in the sky as far as the eye can reach. In the tropics (热带), on the other hand, you are not certain to keep clear of bad weather even at such heights as 18,000 or 20,000 meters. Planes can't climb as high or as quickly in cold air as in warm air. Nor can clouds. (18) {{U}}In practice, this is an advantage to the plane, which is already at a good height when it reaches the polar region and so does not need to climb, while at the same time cold air keeps the clouds down low.{{/U}}

单选题The young man ______ visited our school this morning is Maria"s brother.

单选题The ______ horse ran away from the fire.A. having frightenedB. frighteningC. frightenedD. frighten