.
The house caught ______ fire while they were away. It must have been set ______ on fire by someone.
| A．a; a | B．a; / | C．/; a | D．/;/ |
The scientists all agreed that rules of physics, ______ we are all familiar, govern the world.
| A．to which | B．on which | C．which | D．with which |
The news _____the president was killed soon spread over the country.
| A．that | B．what. | C．how | D．/ |
The article is too long. It needs _______ a little.
| A．cutting off | B．cutting down | C．cutting up | D．cutting out |
-----Do you mind if I turn off the radio?
----- ________. The good news will be on in a few minutes.
| A．Of course not. | B．I’m afraid I do. |
| C．Why not? | D．Yes, just go ahead. |
. -----What do you think of the play?
-----Terrible! I’ve never seen_______one.
| A．a worse | B．a bad | C．a better | D．the worst |