Experiments of this kind in both the U．S．and Europe well before the Second World War．
| A．have conducted | B．have been conducted |
| C．had conducted | D．had been conducted |
The two countries agreed to ________ their differences and work together for peace, which has a positive effect on the international situation.
| A．set down | B．set out |
| C．set aside | D．set about |
A good speaker is supposed to manage to ________ the listeners what he means.
| A．make sense to | B．appeal to |
| C．attach to | D．get across to |
He will have to find some other work, for he can't ________ this loud noise any more.
| A．come up with | B．put up with |
| C．make up with | D．keep up with |
New computers are soon out of date since newer models are ________ constantly.
| A．turned up | B．turned out |
| C．turned down | D．turned over |
John said he wasn't disappointed at the result of the basketball game, but the look on his face ________ him ________.
| A．turned; down | B．took; in |
| C．made; out | D．gave; away |