1.Those elephants,__ come from Africa, can live until they are seventy.
A. they B. that C which D. they which
2.Ha Noi,__I live, lies on the Red River
A. which B. that C. in where D. where
3.Bill Gates,__ is known as the King of computer programs, is famous for his charity work
A. that he B. that C. who D. whom he
4.Dr. Thomson,__ I hadn't seen before, entered the room.
A. whom B. that C. which D. whose
5.The subject__ we are going to discuss is very important
A. that. B. which. C.what. D. A and B
6.The city__ we came to visit was very beautiful
A.where. B.which. C.what. D.whose
7.Anyone__ touches that electrical appliance will get an electric shock
A.who. B.that he. C.where. D.he