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课时提升作业(九) 必修 Unit 3 1. (2017·天津模拟)It remains to be seen North Korea will remain stable under its new young leader. A. whenB. whetherC. whyD. that 2. —How did he break his head while swimming? —my warnings, he dived straight into the shallow water. A. To ignore B. Ignored C. Ignoring D. Being ignored 3. The book was writtencareful observations and detailed studies. A. on the ground of B. on behalf of C. on average D. on the basis of 4. —Have you heard that Jones, along with her parents, to Hainan for the winter vacation? —Really? No wonder I haven’t seen her these days. A. has been B. have been C. has gone D. have gone 5. is some doubtTom will come to see me this weekend as usual. A. It; that B. It; whether C. There; that D. There; whether 6. On May 10, 2017, Ma Yun resigned as CEO of Alibaba, and Lu Zhaoxi it over. A. took B. handed C. got D. came 7. —Mom, can we go to the bakery for some cake? — . Can’t you see I’m busy with the draft? | 
