1.under the tree stands the middle -aged man from whose I get a lot of help son.[whose--whom]
2.china is one of the countries in the world that has a lot of rivers of rivers and lakes.[has --- have]
3.i can do everything which you do.[which --that]
4.one that breaks the law shall get punished.[one--The one]
5.i have found no way which i can deal with the problem more easily.
[which -- in which]
6.he told me all what he did last sunday.[what--- that]
7.the old man now sometimes pays a visit to the school where the workers built 10 years ago.[where --- which/that]
8.the old man now sometimes pays a visit to the school that he worked 10 years ago.[that--- where]
9.i will never forget the days when we spent together in last national holiday break.[when-- which/that]
10.all the world have known the day that 2002 FIFA world cup finals will begin [that --when]