Come and see me whenever ____.
| A．you are convenient | B．you will be convenient |
| C．it is convenient to you | D．it was convenient to you |
This will be the second time that he ____________ China.
| A．will visit | B．is to visit |
| C．has visited | D．visits |
The policeman warned the driver ________ so carelessly.
| A．never to drive | B．to never drive |
| C．to not drive | D．doesn’t drive |
Those ________ are not fit for the work should leave office at once.
| A．who | B．which | C．that | D．whom |
When the expression first came into being, people refused to use it but _____ they began to accept it.
| A．usually | B．gradually |
| C．frequently | D．quickly |
On hearing the sound, the birds flew away in every ________.
| A．direction | B．way |
| C．place | D．side |