Question

---Miss Jones once _______ music _______ at Bardon School for two years and is now an actress.

---No wonder I often hear her sing in the garden.

1. A.
   had taught
2. B.
   has been teaching
3. C.
   is teaching
4. D.
   taught

Answer 1

D
当句中用了for+时间状语时用完成时连用，描述延续状况，但如果表示与现在毫无关系的过去某段时间的经历时用一般过去时，比如“我在农村生活过五年”，I once lived in the country for 5 years，过去完成时表述“过去的过去”，不适合本句。