Some people who don’t like to talk much are not necessarily shy; they just be quiet peopl

问题补充：

Some people who don’t like to talk much are not necessarily shy; they just be quiet people.

A. must

B. may

C. should

D. would

答案：

A. must

(答案→)B. may

C. should

D. would

解析：may这里表示 “可能性”