单项选择题
A. the lack of water resources in China B. the pollution of an important river in China C. the low quality of fresh water in China D. the solutions to water problem in China
A. Polish people have more money now. B. Polish people spend the weekends in similar ways. C. Polish people have more leisure time now. D. Polish people can have holidays in the country.
A. Urging North Korea to shut down its nuclear program. B. Investigating into North Korean nuclear program. C. Financing education in North Korea. D. Helping North Korea refugees.