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B. How soon C. How many times D. How long 3. The librarian thought and thought. At last, she______ an idea. A. kept up with B. caught up with C. came up with D. thought 4. How did he make the child _______ hard? A. to study B. studying C. studied D. study Choose the best answer 5. She ______ well. A. plays the football B. play games C. plays the violin is ______ city in China. A. large B. the larger C. the first largest D. the second largest 7. She is ______ a maths problem. A. going on B. working on C. putting on D. carrying on 8. There are trees on ______ sides of the road. A. every B. each C. either D. both