We Chinese are proud the great success the area of science and technology .A. of ; in B.

问题补充：

We Chinese are proud the great success the area of science and technology .

A. of ; in

B. by ; on

C. with ; on

D. for ; in

答案：

(答案→)A. of ; in

B. by ; on

C. with ; on

D. for ; in

解析：这题考查介词的用法：第一空填of，词组“be proud of”以…为荣“，第二空填in，表示：在…领域，句意是：我们中国人以在科技领域取得的成功自豪。选A。