【 2019 •全国 I 卷】 Of the nineteen recognized polar bear subpopulations, three are declining, six ______ (be) stable, one is increasing, and nine lack enough data. 2. 【 2019 •全国 I 卷】 In recent years some Inuit people in Nunayut ______ (report) increases in bear sightings around human settlements 3. 【 2019 •全国 II 卷】 I love coming here and seeing my family and all the friends I ______(make) over the years. 4. 【 2019 •浙江卷】 When every pupil in the school wears the uniform, nobody _____ (have) to worry about fashion( 时尚 ). 5. 【 2019 •浙江卷】 One study in America found that students' grades ______ (improve) a little after the school introduced uniforms. 6. 【 2018 •全国卷 I I 】 Diets have changed in China — and so too has its top crop. Since 2011,the country _____ ( grow ) more corn than rice. 7. In US high school, everything _____ (record) and graded, including your grades on quizzes, tests and final examinations. 8. As you go through this book, you ________ (find) that each of the millions of people who lived through World War II had a different experience. 9. Just as I got to the school gate, I realized I ________ (leave) my book in the cafe. 10. Shirley ________ (write) a book about China last year but I don’t know whether she has finished it. 11. It was the second time that we _____ (see) her. 12. Either the beautiful sights of this modern city or its local custom____ (attract) thousands of visitors during the past years. 13. At this time tomorrow we__________ (fly) over the Atlantic Ocean. 14. The father as well as his three children ____________ (go) skating on the frozen river every Sunday afternoon in winter. 15. Engineers ________ (set) up over 15,000 sensors ( 传感器 ) nationwide and wiring them into a web. 16. The treatment continued and finally the deep, bloody pain ______ (be) 100% healed.