【急】求解英语词性转换！

7. ______(meet) the growing demand for cars, the company _____(open) a new factory in the State of Michigan in 1910.
9. To my surprise, he was seen last ___(play) by the river.
11. It won’t be long before he _________(come) back.
13. I prefer to stay at home rather than ______(go) out to dance.
15. He _____(not leave) the hotel far when he heard a loud noise.
16. Every possible means _______ (try) to save the sick boy so far.
17. She looks sad. What do you suppose _____(happen) to her?
19. It ______(be) two weeks before you come to see me again.
20. The letters in the letter box are said ______(collect) twice daily.
21. The road, which ____(repair) now, has been blocked.

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