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分层限时跟踪练 Ⅰ.单句语法填空 1．With our knowledge based (base) on practice，we can make great contributions to our country. 2．What's your opinion of Mr.Li's request that more time (should)_be_spent (spend) in reading English? 3．It is_recognized (recognize) that environment pollution has become one of the most serious problems that people face. 4．Having a good command of English grammar makes it easier for him to understand long sentences while reading. 5．Has the company officially (official) confirmed the appointment? Ⅱ.单句改错 1．According to a recent study they have come up the conclusion that the African elephant should be divided into two different species. ____________________________________________________________ 【答案】 come up后加with 2．As far as I know，he is very angry because what you have said. ________________________________________________________________ 【答案】 because后加of 3．He makes good use of time in study than Bob. ________________________________________________________________ 【答案】 good→better 4．Happy people don't necessarily have the best things; they make most of everything that comes their way. | 
