.—His father an actor didnt he ? —Yes he did . A. used to beingB. usedC. used to be D.

问题补充：

.—His father an actor , didn he ? —Yes, he did .

A. used to being

B. used

C. used to be

D. uses to be

答案：

A. used to being

B. used

(答案→)C. used to be

D. uses to be

解析：句意：他的父亲过去是一名医生，是吗？——是的，他是。结合语境可知上文描述的是过去的动作，故谓语动词用过去时态。Used to do sth过去常常做某事，be used to sth习惯于某事，故选C。