Combine the sentences, using who, whom, which or whose. (cẩn thận những câu là "Non-defining relative clauses" thì nhớ phải thêm dấu phẩy):
27. Those documents have been found. They were stolen from a car.
-> .............................................................................
28. He works for this computer magazine. The magazine is very popular in Mexico.
-> .............................................................................
29. The man called the police. His wallet was stolen.
-> .............................................................................
30. The people were nice. We visit their house.
-> .............................................................................