_______she is not so cheerful________she used to be?
| A．How it is that；as | B．How is it that；as |
| C．Is it why；that | D．Why is it that；what |
—Where did you get to know her?
—It was on the farm __________ we worked.
| A．that | B．there | C．which | D．where |
Some pre-school children go to a day care center，__________ they learn simple games and songs.
| A．then | B．there | C．while | D．where |
After graduation she reached a point in her career __________ she needed to decide what to do.
| A．that | B．what | C．which | D．where |
The village has developed a lot __________ we learnedfarming two years ago.
| A．when | B．which | C．that | D．where |
Theywill fly to Washington，__________ they plan tostay for two or three days.
| A．where | B．there | C．which | D．when |