New ways have been found to prevent the river ______.
| A．not to be polluted | B．against polluting |
| C．from polluting | D．from being polluted |
He isn't such a man ______he used to be.
| A．who | B．whom | C．that | D．as |
It there anyone in your class ______family is in the country?
| A．who | B．who's | C．which | D．whose |
Do you know the man _______?
| A．whom I spoke | B．to who spoke | C．I spoke to | D．that I spoke |
Great changes have taken place in that school. It is no longer _______ it was 20 years ago, _______ it was so poorly equipped.
| A．what; when | B．that; which | C．what; which | D．which; that |
The way he did it was different ________ we were used to.
| A．in which | B．in what | C．from what | D．from which |