The film a novel by Sinclair Lewis.A. is based onB. based onC. basing onD. base

问题补充：

The film a novel by Sinclair Lewis.

A. is based on

B. based on

C. basing on

D. base

答案：

(答案→)A. is based on

B. based on

C. basing on

D. base

解析：考查固定词组。固定词组be based on…以..为基础；句意：这部电影是以Sinclair Lewis的一部小说为基础的。根据句意说明A正确。