11, Sheila, whom I’ve just met, is a TV producer.

12, The treaty has been signed by the president who took power last year.

13, David, who I’m sure that you all know, is going to talk about careers.

14, Who lives in the house which has a white door?

15, We visited a patient whose eyesight had been restored by the surgeon.

16, The girls whose names begin with the letters A-K should go to the main office.

17, The countries which have very large debts will not be helped.

18, The people whose houses were damaged by the bomb will be compensated.

19, The shop whose turnover is the largest will make a big profit.

20, The player whose shirts were dirty changed their shirts at half- time.

21, Professor Wilson, who teaches Chemistry, is an excellent lecturer.

Chúc bạn học tốt!