The old scientist devoted all her time she had the western parts of China.A. to developB.

问题补充：

The old scientist devoted all her time she had the western parts of China.

A. to develop

B. developing

C. to developing

D. developed

答案：

A. to develop

B. developing

(答案→)C. to developing

D. developed

解析：本题中主要考查的是devote sth to doing sth ，故选C