—How does your father go to work?—He often goes to work . A. by a busB. take the busC. by

问题补充：

—How does your father go to work?

—He often goes to work .

A. by a bus

B. take the bus

C. by bus

D. take bus

答案：

A. by a bus

B. take the bus

(答案→)C. by bus

D. take bus

解析：by在表示交通方式时，后面直接接交通工具,作方式状语。Take表示乘某种交通工具去,作谓语.句意:你的父亲怎样去上班?_他常常乘公交车去上班.结合语境可知本句不缺少谓语动词,故选C,做方式状语.