Insert the proper form of the werb 1)I think (to see) him ...

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Insert the proper form of the werb
1)I think (to see) him somewhere before.
2)He'll be ready in a minute.He(to clean)his shoes
3)We( to go ) to the theatre tonight
4)They couldn't leave the studio  when I called because they (to film)
5)When I shouted, they ( to jump)off the roof and (run)away
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