--Do you know the man with a pair of sunglasses is?--An actor I think.A. whoB. howC. what

问题补充：

--Do you know the man with a pair of sunglasses is?

--An actor, I think.

A. who

B. how

C. what

D. whom

答案：

A. who

B. how

(答案→)C. what

D. whom

解析：who谁；how 怎样；what什么；whom谁。根据下文，一名演员，我认为。结合语境可知上文提问的是职业，故选C。