_____, water can be changed into gas.
| A．Heated | B．Being heated |
| C．Having heated | D．Having been heated |
It’s necessary to prepare for a job interview.the answers ready will be of great help.
| A．To have had |
| B．Having had |
| C．Have |
| D．Having |
The UN charter that had four main purposes operates programmes to help people around the world.
| A．basing on |
| B．bases on |
| C．based on |
| D．is based on |
in the accident, the unfortunate driver felt upset.
| A．Involving |
| B．To involve |
| C．Involved |
| D．Being involved |
The Beatles,many of you are old enough to remember, came from Liverpool.
| A．what |
| B．that |
| C．how |
| D．as |
Look! The man we referred to here.
| A．came |
| B．coming |
| C．is coming |
| D．comes |