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tries ______ the 2020 Olympic Games in Beijing. A. took part in B. attended C. joined D. held 5. China is still a ______ country at the present time. A. developed developed C. highly developed D. developing 6.. By the way, where’ s Li Xiang? He swimming. A. has gone B. has been C. has gone to D. has been to 7. In the past, most children couldn’ t go to school poor economy. A. because B. because of C. since D. for 8. Have you ever slept in the open air? . I’ m very timid(膽小的 ). A. Yes, I