1.he is shy,so he can't work in group

2.I can't take exercises much because i don't have enough free

1.my motherbought an interesting book (using which)

2.what is the name of the man ? You borrowed his car

1.My salary is high .His salary is very high (than)

2.the lady is a famois writer . You met her at the party lsst night 

-the lady whom.........

3.A man answered the phoned. He told me you were away.

A man who...............

1.My mother bought an interesting book (using which)

2.What is the name of the man ? You borrowed his car.

3.the man from whom she received the present was a doctor.

-she received a present fro ..........

4.Government should limit the munber of cars (passive)

5.People should save pandes from extinction

1.She is 1.7m in height .He is 1.6m in height (than)

2.the computer is expensive.I bought it in HCM city

-the computer which...........

3.The picture was beautiful .It was drawn by my close friend.

-the picture which............

4.Mr.Jump lives in a luxurious villa (using which)

.................