单选题What is the major problem with using animals as body for growing human organs?

单选题It was a wonderful trip. So which city did you like better, Paris or Rome?It was a wonderful trip. So which city did you like better, Paris or Rome?________ . There were good things and bad things about them.

单选题After the music had ______ there was a storm of applause. A. died out B. died hard C. died off D. died away

单选题Mishima became a well-known writer after he had ______.

单选题They were at work when they received ______ SOS from ______ school, and they immediately started their police cars.

单选题John Doerr called the boom in the 1990s the "largest single legal creation of wealth" because

单选题According to the passage, if you want to see your friend who is in hospital, you have to______.

单选题I felt the soil creep and ______ beneath me, like some monstrous serpent.

单选题If we say something is ______ , we mean that we find it extremely pleasant or enjoyable. A. gracious B. gloomy C. gigantic D. gorgeous

单选题①John Roebling planned to build the Brooklyn Bridge before 1867. But he never really gotstarted. In 1869 , he died of an accident. The job fell to his son Washington , a master of construction.In 1872

单选题Farmers can save a considerable amount of pesticide by ______. ( )

单选题[此试题无题干]

单选题The company will ______ to its agreement, no matter how costly the process maybe.

单选题They have been trying to arrive at a practical solution______ the problem.

单选题Walking is Britain's most popular outdoor ______ and is the most pleasant and satisfying way of discovering the countryside.

单选题______ I should fail again, I will not give up the experiment.

单选题Experts say walking is one of the best ways for a person to ______ healthy. A. preserve B. stay C. maintain D. reserve

单选题______ my delight, our school football team won the game easily.

单选题Dinosaurs were reptiles which became extinct about 65 million years ago. The most intriguing question about dinosaurs has always been " (21) did they die out?" There is no simple answer to this question, (22) many hundreds of scientists are studying the problem. They are not studying the extinction of the dinosaurs (23) , but the whole question of extinction. Many other plants and animals have (24) in the past, and it is important to understand (25) this happened. Having this information could help save many species that are (26) in the modern world. Humans are causing extinctions now, because of pollution and other damage (27) the environment. Maybe the dinosaurs can tell us how to save the earth today, (28) their extinction 65 million years ago! Some of the early dinosaur scientists, 100 years ago, thought the dinosaurs died out because the (29) changed, and they could not breathe. Others thought that the dinosaurs disappeared simply because they became too big. They were (30) to move and could not find enough food (31) One theory is that a huge killer meteorite (32) the earth. Some scientists (33) that the extinction of dinosaurs was possibly due to rapid (34) of the planet's climate. Perhaps huge amounts of lava pours out of volcanoes in India. This sent up vast (35) of dust that blacked out the sun, and made the earth icy cold.