—Where did you pick up the stamp?
—It was at the post office ________ we worked in the summer vacation.
| A．that |
| B．where |
| C．which |
| D．when |
The train ________ arrive at 11∶30, but was an hour late.
| A．was about to | B．was likely to |
| C．was supposed to | D．was certain to |
While building a tunnel through the mountain, ________ .
| A．an underground lake was discovered |
| B．there was an underground lake discovered |
| C．a lake was discovered underground |
| D．the workers discovered an underground lake |
I planned ________ to see you last week, but I was ill.
| A．to have come | B．to come |
| C．to be coming | D．to have been coming |
Now then, children, Its time you ________.
| A．were washed and dressed | B．washed and dressed |
| C．are washed and dreesed | D．washed and dress |
My parents used ________they had to get a new car for my brother.
| A．which | B．all what |
| C．what | D．不填 |