They have no idea at all ____.
| A．what he is working on | B．what is he working on |
| C．what did he work on | D．what he is working |
Sally worked late in the evening to finish her report ______ her boss could read it as the first thing next morning.
| A．so that | B．because |
| C．before | D．or else |
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 |