What do you think of the movie Avatar？Interesting. It is again.A. worth watchingB

问题补充：

--- What do you think of the movie Avatar？

--- Interesting. It is again.

A. worth watching

B. worth to watch

C. worthy watching

D. worthy to watch

答案：

(答案→)A. worth watching

B. worth to watch

C. worthy watching

D. worthy to watch

解析：be worth doing表示值得做某事，故本题选A。