．Every possible means _______to prevent the air pollution, but the sky is still not clear．
| A．are being used | B．have been used |
| C．has been used | D．had been used |
When travelling in buses or trains,we are likely to have conversations _____ we give information or opinions about different things.
| A．where | B．which | C．what | D．when |
---- Do you regret having left your first job?
---- Why should I? I _____ as much, but I enjoy more of it.
| A．didn’t earn | B．don’t earn | C．hadn’t earned | D．haven’t earned |
The campaign is trying to get the _____ across to young people that drugs are dangerous.
| A．lesson | B．topic | C．message | D．information |
Don’t be so discouraged. If you _____ such feelings, you will do better next time.
| A．carry on | B．get back | C．break down | D．put away |
—You can’t stand working with Jane in the same office, can you?
—______,because she just refuses _______while working．
| A．No, to stop talking | B．Yes ,to stop talking |
| C．No, stopping to talk | D．Yes, stopping talking |