Question

---John looks a bit upset.Did you tell him the bad news?
---Yes，but I________him after his birthday party

1. A.
   should have told　　　
2. B.
   must have told
3. C.
   shouldn’t have told　　　
4. D.
   needn’t have told

Answer 1

A
這題考查情態(tài)動詞的完成式的用法：should have told“本應(yīng)該做卻沒做”must have done“過去一定做了”，shouldn’t have told“本不應(yīng)該做卻做了”needn’t have told“本不必做某事卻做了”，句意是：--約翰看上去有點不安，你告訴他壞消息了嗎？--是的，但我不該在他生日的時候告訴他。選A。