1 . Perhaps she had been ________ (斗争；搏斗) against the window too long and was too tired? (根据汉语提示单词拼写)

2 . My grandpa________ (lie) on the sofa before I walked into the room. (所给词的适当形式填空)

3 . Since his return from the United States, Qian Xueshen had been o___________ himself with the great cause of missile development(导弹研发). (根据首字母单词拼写)

4 . She ________ (live) in Paris before she came to China. (所给词的适当形式填空)

7 . Our factories ________(produce) bikes for ten years before the electric ones appeared. (所给词的适当形式填空)

8 . The two countries ________(fight) for oil before they reached an agreement. (所给词的适当形式填空)

9 . Up to that time he ___________________ (translate) those books. (所给词的适当形式填空)

10 . He___________________ (write) the letter till two o’clock yesterday. (所给词的适当形式填空)