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16. if the weather (be) rainy, we (stay) at home tomorrow.
17. i (go) shopping when i (finish) my homework.
18. when i (know) english well, i (read) a lot of books in english.
19. if i (have) time, i (come) to see you on sunday.
20. when my father (come) home from the factory, we (go) to the cinema.
21. the new library (to build) two years ago.
22. all my mistakes (to correct) by the teacher.
23. the umbrella ( to leave) by somebody on a tram.
24. mushrooms ( to gather) in autumn.
25. russia ( to wash) by the white sea.
26. i was given a good mark for my answer yesterday. (when? )
27. the first olympic games took place in greece. (where? )
28. children need milk. (what? )
29. we met many hikers on the roads last sunday. (where? )
30. i have heard the football results on the radio. (yes/ no? )