Have you heard of Zhai Mo became the first Chinese person to travel around the world in a

问题补充：

Have you heard of Zhai Mo became the first Chinese person to travel around the world in a sailboat?

A. that

B. whose

C. which

D. whom

答案：

(答案→)A. that

B. whose

C. which

D. whom

解析：考查定语从句。先行词是Zhai Mo，在定从became the first Chinese person to travel around the world in a sailboat中作主语，所以选A。