It is reported that Beijing and Zhangjiakou（张家口）will compete to host the Winter Olym

问题补充：

It is reported that Beijing and Zhangjiakou（张家口）will compete to host the Winter Olympics, which will China’s social development.

A. interest

B. benefit

C. gain

D. contain

答案：

A. interest

(答案→)B. benefit

C. gain

D. contain

解析：考查动词。A. interest使感兴趣；B. benefit有益于；C. gain获得；D. contain包含。句意：据报道，北京和张家口将争取举办冬奥会，这将对中国的社会发展有益。故B正确。