20.There used__________a post office at the corner of the street.
| A．to be | B．to being | C．to have | D．to having |
It was not until she had arrived home _____ her appointment with the doctor.
| A．did she remember | B．that she remembered |
| C．when she remembered | D．had she remembered |
The cruelty of the terrorists towards the two Chinese engineers in Pakistan and _____ of the terrorists towards America in September 11, filled everyone with horror.
| A．those | B．that | C．one | D．it |
— He ought to have been warned of the danger.
— ______, but he just wouldn’t listen to me.
| A．So ought he | B．So he was |
| C．So was he | D．So he had |
The traffic problem we are looking forward to seeing _____ should have attracted the local government’s attention.
| A．solving | B．solve |
| C．to solve | D．solved |
— He hasn’t finished the work yet.
— Well, he _____.
| A．ought | B．ought to |
| C．ought to have | D．ought to have finished |