A.How tall are Tom and the small dinosaur?

B.Who is taller, Tom or the small dinosaur?

C.How is taller, Tom or the small dinosaur?

【答案】B

【解析】

A选项“汤姆和那只小恐龙多高？B选项“汤姆或那只小恐龙谁更高些？”C选项表达错误，根据题目要求可知该句用比较级表达，故选B。