-All of us sometimes.
-You had better have a good rest when you are free.
A. gets tired
B. get tired
C. getting tired
D. is tired
网友回答
A. gets tired
(答案→)B. get tired
C. getting tired
D. is tired
解析：根据频度副词sometimes有时，可知句子为一般现在时态，All of us我们所有人，复数形式，故谓语动词用复数，选B。