_______, dolphins have no sense of smell. A. As know as far B. As far as is known C. It is known as far D. Known as far as it is
Giải thích
Đáp án B.
Cụm: As far as is known = As far as people know: như mọi người đã biết.
As far as I know/I am concerned ...: theo như tôi được biết.
Have no sense of smell: không có khứu giác
Have (no) sense of humor: (không) có khướu hài hước