- Tom where is your father?　 I’m not sure. He in his office.A. isB. may beC. maybe

问题补充：

--- Tom, where is your father? --- I’m not sure. He in his office.

A. is

B. may be

C. maybe

D. may

答案：

A. is

(答案→)B. may be

C. maybe

D. may

解析：is系动词，是；may be可能是；maybe副词，也许，可能；may情态动词，可以，可能。句意：汤姆，你的父亲在哪儿？——我不确定。他可能在办公室。结合语境可知下文中缺少谓语动词，故选Ｂ。