Question

4. When Mary was young,she able to dance very well.

   A. could be   B. can be

   C. was   D. could

Answer 1

4. C

4. C解析:本题考査be able to的用法。句 意:当玛丽年轻的时候，她能把舞蹈跳得很 好。表示过去能做某事要用was able to do sth.。