Question

---Jane looks very sad. Did you tell her about the sad news?

---Yes, but I ______ her later.

1. A.
   must have told
2. B.
   shouldn't have told
3. C.
   should have told
4. D.
   oughtn't to have told

Answer 1

C
问句：你把那个坏消息告诉了她吗？答句：告诉了，但我该晚点再告诉她的。根据上面分析可知，B，D两答案相同，而A项则表示对过去发生的事情的肯定推测，故选C．