—I'll call you ______ I arrive in Shenzhen．
—Thanks, and good luck．
| A．while | B．until | C．as | D．once |
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 had to decide what to do.
| A．that | B．what | C．which | D．where |
We shouldn’t s0pent our money testing so many people, most of __________ are healthy.
| A．that | B．which | C．what&nze:1bsp; | D．whom |
Last week, only two people came to look at the house, __________ wanted to buy it.
| A．none of them | B．both of them | C．none of whom | D．neither of whom |
You can find whatever you need at the shopping centre, __________ is always busy at the weekend.
| A．that | B．where | C．what | D．which |