They will start their project at helping the poor children to be educated in the west of C

问题补充：

They will start their project，at helping the poor children to be educated in the west of China.

A. aims

B. aiming

C. being aimed

D. to aim

答案：

A. aims

(答案→)B. aiming

C. being aimed

D. to aim

解析：考查现在分词做后置定语，aim at旨在, project和aim at是主动关系，用现在分词做定语，修饰their Project，因此后面的定语可以改为定语从句。即为They will start their project which aims at helping the poor children to be educated in China＇s west.句意：他们要开始目的是帮助中国西部的贫穷孩子受教育的工程。选B。