The number of the employees has grown from 1,000 to 1,200. This means it has risen ____20 percent.
| A．by | B．at | C．to | D．with |
Some pre-school children go to a day care center, __________ they learn simple games and songs.
| A．then | B．there | C．while | D．where |
He was educated at the local high school, ______ he went on to Beijing University.
| A．after which | B．after that | C．in which | D．in that |
The road conditions there turned out to be very good, ____ was more than we could expect.
| A．it | B．what | C．which | D．that |
All the neighbors admire this family, ____ the parents are treating their child like a friend.
| A．why | B．where | C．which | D．that |
The growing speed of a plant is influenced by a number of factors, ____ are beyond our control.
| A．most of them | B．most of which |
| C．most of what | D．most of that |