精选优质文档-倾情为你奉上1. . This machine _ (not work). It hasnt worked for years.2. If their marketing plans succeed, they_ (increase) their sales by 20 percent.3. Population experts predict that most people _(live) in cities in the near future.5. He _(play) football regularly for many years when he was young. (天津)6. - Have you known Dr. Jackson for a long time?- Yes, since she _(join) the Chinese Society. (宁夏)7. Teenagers _
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