Unit 4 单元练习题I. 单选(选出最佳答案)(共 20 分)1. The children are very quiet; I wonder what they are up____ . A against B for C to D with2. the development of science and technology, more and more dreams will come true.A. With B. To C. As D. Of3. The girl was last seen near the Central Park.A. missing; playing B. missing; played C. missed; playing D. missed; played4. My brother is interested in history in general. He is reading a book about history of America recently.A. the; a B. /; the C. the; / D. /; a5. late tomorrow morning, you should set off on your own.A. Should I arrive B. I should arrive C. Had I arrived D. I had arrived6. Can you tell me a situation these phrases are used?A. which B. where C. that D. when7. The expression on his face suggested that the football match was .A. excited; excited B. excited; exciting C. exciting; excited D. exciting; exciting 8. This website is very useful. It has information that we need.A. many B. little C. a few D. plenty of9. Today more than 80 percent of the Australians in the six big cities around the coast.A. live; locating B. living; locating C. living; located D. live; located10. The accident could have been much worse; fortunately no ___ was done to the boy. A. stress B. harm C. need D. help11. ----I feel like a film this evening.---- But I would like the football match on TV this evening.A. seeing; watching B. to see; to watch C. seeing; to watch D. to see; watching12. Immediate actions should be so as to protect the animal species in danger. A. made B. taken C. done D. built13. ------ is the population of the area ?----- About 4 million. Two third of the population farmers.A. How many, is B. How much, are...