—Is the letter from your mother?
—Yes.But she ________the letter herself，because she doesn’t even know one word.
| A．needn’t have written | B．can’t have written |
| C．might not have written | D．should not have written |
—Have you seen the movie “2012”？It’s quite thrilling.
—No，I ________ to buy a ticket，but it ________ cats and dogs.
| A．have intended；was raining |
| B．intended；had rained |
| C．have intended；rained |
| D．had intended；was raining |
I was sleeping when the telephone rang again.It was the third time that I ________ that night.
| A．have been interrupted | B．had been interrupted |
| C．interrupted | D．had interrupted |
Up to now，the program________thousands of children who would otherwise have died.
| A．would save | B．saves |
| C．had saved | D．has saved |
—Who do you think ________the book here?
—It may be John.He was sitting here all the morning.
| A．was leaving | B．leaves |
| C．had left | D．has left |
Mum，you really need to have a rest！You ________in the kitchen ever since you came back home three hours ago.
| A．had worked | B．were working |
| C．have been working | D．worked |