1. What people are doing.....the environment is gradually destroying it. A. to B. with C. for D. in 2.My sister had a baby girl yesterday, and this is my first........ A. relative B. nephew C. niece D. cousin 3.She can’t go home during the midterm holiday........ she has no money. A.unless B. if C. until D. without 4.Scientists have proposed a.........to the problem of global warming. A. effect B. result C. plan D.solution 5..........the books I have, I like Sherlock Holmes best. A.All of B. Of all C. For all D.All with 6.You'd better.....back to study now; the final exams are coming soon A. than get B. to get C. than getting D. get 7.Please remember to.....the lights as you leave the room. A. go out B. turn off C. get out D.set off 8.Kate: "Must I wear a school uniform?" - Mi:No, you....." A.mustn’t B. don’t C. won’t D.needn’t