- I think Lucy is the best dancer in the world.I agree with you. No one can dance.A

问题补充：

--- I think Lucy is the best dancer in the world.

--- I agree with you. No one can dance.

A. good

B. well

C. better

D. worse

答案：

A. good

B. well

(答案→)C. better

D. worse

解析：句意：我认为露西是世界上最好的舞者。--我同意你的观点，没人能跳的更好。根据句意，她是世界上最好的舞者，所以没有人比露西跳的更好。故选C.