People are living in world where mouse clicks rule our life so online searches have beco

问题补充：

People are living in world where mouse clicks rule our life, so online searches have become must.

A. the; /

B. /; a

C. a; a

D. a; the

答案：

A. the; /

B. /; a

(答案→)C. a; a

D. a; the

解析：考查冠词。句中live in a world…生活在一个……的世界。become a must变成一件必需品，选C。