Relations between China and Africa are based on a balance of interests and the needs and demands of developing countries.
A. provides
B. provided
C. providing
D. is providing
网友回答
A. provides
B. provided
(答案→)C. providing
D. is providing
解析：are based on 和providing 为并列谓语，前者表状态，后者为主动语态进行时， 与前者共用are。