The engineer ______ my father works is about 50 years old.为何不可选B?我是想用work on来表示我父

题目

The engineer ______ my father works is about 50 years old.为何不可选B?我是想用work on来表示我父
The engineer ______ my father works is about 50 years old.
A.to whom B.on whom C.with which D.with whom
为何不可选B?我是想用work on来表示我父亲从事的工程师这个职业已经有50年的历史了.

答案