The governments are very _________ about setting a new policy and make no decision until they are quite sure it is the right one．
| A．particular | B．concerned |
| C．cautious | D．certain |
It's helpful to put children in a situation ________ they can see themselves differently.
| A．that | B．when | C．which | D．where |
Whatever is left over may be put into the refrigerator，________ it will keep for two or three weeks.(2011·安徽)
| A．when | B．which | C．where | D．while |
Sales director is a position ________ communication ability is just as important as sales skills.(2012·重庆)
| A．which | B．that | C．when | D．where |
That's the new machine ________ parts are too small to be seen.
| A．that | B．which | C．whose | D．what |
The prize will go to the writer ________ story shows the most imagination.
| A．that | B．which | C．whose | D．what |