The old man has two sons, ____________ are working in the supermarket.
| A．both of whom | B．each of them |
| C．both of them | D．all of whom |
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 |
We shouldn’t spent our money testing so many people, most of ___ __ are healthy.
| A．that | B．which |
| C．what | 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 |
Mr. Reed made up his mind to devote all he had to ________ some schools for poor children.
| A．set up | B．setting up |
| C．have set up | D．having set up |
Go on ________ the other exercise after you have finished this one.
| A．to do | B．doing |
| C．with | D．to be doing |