Chineseby more and more people from all over the world today.A. learnB. learnedC. is learn

问题补充：

Chineseby more and more people from all over the world today.

A. learn

B. learned

C. is learned

D. was learned

答案：

A. learn

B. learned

(答案→)C. is learned

D. was learned

解析：考查动词被动语态的用法。“学汉语”，如果汉语做主语，要使用被动语态；本句末尾有now，指的是现在的情况，用一般现在时。