24．Li Ming often 　　　　(help)his mother do some housework．

23．Listen! There are some girl 　　　　(sing)for an old man．

22．What 　　　　(happen)to you last week?

21．I have fun 　　　　(play)football．

20．I saw many people 　　　　(fly)kites at Tian’anmen Square．

19．It’s time for everyone 　　　　(go) home．

18．Danny, I want 　　　　(take) a picture for you．

17．They 　　　　(go) to the Great Wall tomorrow．

16．Look! He 　　　　(put) film in his camera．

15．A man who has not c　　　 　the Great Wall is not a true man．