---Who do you think is the man first flew into space in China?- Yang Liwei is.A. /B. w

问题补充：

---Who do you think is the man first flew into space in China? --- Yang Liwei is.

A. /

B. who

C. that

D. whom

答案：

A. /

B. who

(答案→)C. that

D. whom

解析：根据题干，可知本句是定语从句，因为做从句的主语，不能省略，也不能用whom，故排除A；因为主句的主语是who，故为了避免重复，应用that。所以本题选C。