Last term our maths teacher set so difficult an examination problem ______none of us worked out.
| A．that | B．as | C．so that | D．which |
—Can I use your telephone？—________.
| A．It's all right, thanks | B．Yes, go ahead |
| C．It doesn't matter | D．No, please don't do it |
It's not enough. We need ________ more than that.
| A．quite | B．most | C．very | D．rather |
The terrible weather ________ our difficulty in building the road.
| A．added | B．added up | C．added to | D．added up to |
—Yesterday we learnt the fifth, ________？
—I'm sorry, Mr. Li. I don't understand everything.
| A．didn't you | B．have you got it |
| C．do you think so | D．how about |
Wouldn't it be ________ wonderful world if all nations live in________ peace with one another?
| A．a; / | B．the; / | C．a; the | D．the; the |