EX2: Điền đại từ quan hệ phù hợp. Điền X vào những vị trí không cần đại từ quan hệ.
1.      The security guard ………………..... was working that night didn't see anything.

2.      The patient, ………………….. had a serious disease, was taken to hospital immediately.

3.      I know a person …………………... can speak seven languages.

4.      They found the weapon …………………... was used in the crime.

5.      Yesterday I met John and Mary, ................................ are my brother's friends.

6.      The police followed the criminals, ……………………... ran away through the back door.

7.      We visited the church …………………….. is in the middle of the square.

8.      Someone stole my money belt, …………………….. contained my wallet and all my documents.

9.      He knows the girl ………………….. has three dogs.

10.  This is Gerry………………….. saw a rabbit in our garden.

11.  This is John ………………….. laptop was stolen this morning.

12.  Mrs Miller, ………………….. father is a painter, came to New York in 1950.

13.  I talked to the man………………….. lives in High Street.

14.  James Watt was an inventor ………………….. ideas changed the world.

15.  Doris is the lady ………………….. got the first prize.

16.  Ethan, ………………….. is Isabella's boyfriend, plays badminton.

17.  What do you call someone ………………….. lives in Texas?

18.  The Smiths, ………………….. son went to the USA, are selling their house.

19.  This is the boy ………………….. had an accident.

20.  Yesterday I saw a car ………………….. was really old.

21.  Mandy is the girl …………………..  I met on Friday.