题目

作为一种广泛存在的有机化合物，小分子硫醇一直以来被视为消除生命体有害物质的“清道夫”。中科院上海有机化学研究所的科研人员发现，它们除了具有清除毒害的保护性功能，还具备“导演”抗生素精密合成的建设性功能。该发现揭示了以硫醇化学为核心的林可霉素生物合成机制，改变了人类对于小分子硫醇的传统认识，为设计和创造新型人造“生命细胞”并在“细胞工厂”中实现含糖单元的新型生物基化学品的“生物制造”奠定了分子基础。 When I was very young, I wanted to become a veterinarian (兽医) one day, because I loved animals very much, especially dogs. But it was a pity that there was no room in my adult life for a dog. Then, last year, I could not believe that I developed cancer (癌症). I wanted to keep a dog, but I knew my illness made it impossible for me to keep one. In early September to my surprise, my doctor told me that I could keep a pet as my friend, because my immune system (免疫系统) was strong to keep a pet.The same day I went to an animal market with my friends. When I saw a 9-week-old dog with big brown eyes, nice ears and white fur all over the body, I took him home. I called him Oscar. I’m happy these days since Oscar came into my life. My new favourite pastime is to watch him sleep, eat and run. And I have been spending more time caring about him, taking long walks with him in the park.Now I still have the physical (身体的) examination once a week at the hospital. But my illness has taken a turn for the better with the company (陪伴) of a dog. My immune system getting stronger, my doctor tells me. Thanks to Oscar, my life has changed a lot.1.Why did the writer want to be a veterinarian?A.He was interested in medicine. B.His immune system was strong.C.He developed cancer. D.He loved animals very much.2.Why did the writer’s doctor advise him to keep a pet?A.Because he developed cancer.B.Because a dog was friendly to him.C.Because he had a strong immune system to do that.D.Because he had enough room in his house to keep a pet.3.What does the underlined word “pastime” mean in Chinese?A.过去 B.消遣 C.行动 D.部分4.The writer does the following to pass time except ______.A.seeing Oscar run B.watching Oscar sleepC.eating with Oscar D.taking Oscar for long walks5.What made the writer’s life change a lot?A.The dog appeared as a new company in his life. B.His immune system is getting stronger.C.His illness gets worse than before.  D.His cancer has gone.