Harrison Ford is thought to be one of the few movie stars as a carpenter before.A. to wor

问题补充：

Harrison Ford is thought to be one of the few movie stars as a carpenter before.

A. to work

B. to be working

C. to have worked

D. to have been working

答案：

A. to work

B. to be working

(答案→)C. to have worked

D. to have been working

解析：考查不定式用法。本题中不定式做定语修饰movie stars；因为后面有时间状语before说明这是一个已经完成的动作，故使用不定式的完成时表示一个已经完成的动作。故C正确。