Question

Tony  ______ for the company as an engineer for two decades. Now he teachesmechanics m Peking University.

1. A.
   has worked
2. B.
   worked
3. C.
   is working
4. D.
   had worked

Answer 1

B
试题分析：考查动词的时态。句义：唐妮在这个公司做工程师做了20 年，现在她在北京大学教力学。前句是说明她的过去的工作经历，后句是说明她现在的工作。所以前句应该用一般过去时，所以B正确。
考点：考查动词的时态。