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分层限时跟踪练 Ⅰ.单句语法填空 1．The company is developing a new product in combination (combine)with several research centers. 2．Before making the final decision，you'd better balance (balance) the advantages against the disadvantages. 3．We can work wonders if we unite as a family，caring for each other and helping those in need.Unity is strength (strong)． 4．Having_benefited(benefit)from the teacher's help，Li Ping has made great progress in his English study. 5．How will you use the limited(limit)time you have? 6．Since Jenny stopped cycling to work，she has put on weight. 7．The doctor told Bob his heart was in poor condition and that he must cut down on alcohol and smoking. 8．Those who lie and cheat will never get away with it. 9．He worked hard to win back his boss's trust and respect. 10．He was sent to_spy(spy)on the enemy，but unfortunately he was caught. Ⅱ.完成句子 1．在骑自行车时，她失去平衡跌倒了。 While she was riding a bike，she lost_her_balance and fell down. 2．一个人的生命是有限的，但是为人民服务是无限的。 There is_a_limit_to one's life，but no_limit_to serving the people. | 
