The meeting tomorrow afternoon is about rid of pollution.A. held to get 　B. to be held

问题补充：

The meeting tomorrow afternoon is about rid of pollution.

A. held, to get

B. to be held; getting

C. to hold; to get

D. being held; getting

答案：

A. held, to get

(答案→)B. to be held; getting

C. to hold; to get

D. being held; getting

解析：不定式表示将来；get rid of阻止；除掉。