45、The students 　　　　　　 (clean) their classroom tomorrow.

44、They 　　　　　 　　(build) a new bridge over the river next year.

43、Look! The young worker 　　　　　　 　(show) the students around the factory .

42、My parents 　　　　　　　 　　(live) in Beijing since 1949.

41、The scientist 　　　　　　 　(give) us a talk yesterday.

40、Li Ping 　　　　　　 (write) a composition every week.

39、Stay here, bag. Don’t go out. It 　　　　　 (rain) now.

38、She 　　　　　　 　　(go) to the cinema with her classmates tomorrow evening.

37、Zhang Hong 　　　　　 (make) many friends since she came to Paris.

36、They 　 　　　 　　(visit) the History Museum last week.