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 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：言语不多的人未必就腼腆，他们可能只是好静而已。must肯定；may或许；should应该；would想必。