( )6.A.Sure. B.Of course not. C.He is certainly great.
( )7.A.Yes, he is great. B.Yes, he is a scientist. C.Because he developed hybrid rice.
( )8.A.Yes, there is. B.Yes, I do. C.Yes, it is.
( )9.A.Yes, they are. B.They are really great. C.Chairman Mao.
