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.
-> .............................................................................
27. Those documents have been found which were stolen from a car
28. He works for this computer magazine which is very popular in Mexico
29. The man whose wallet was stolen called the police
30. The people whose house we visited were nice