. Jack almost fell off the cliff, but managed to _____ until help came.
| A．keep on | B．catch on | C．count on | D．hang on |
Not having work out the problem,leave the office．
| A．so he was not allowed to | B．and he didn’t want to |
| C．the teacher couldn’t make him | D．he couldn’t free himself to |
Nowadays, many people walk to workCopenhagen Conference calling for living a
low-carbon lifestyle to cope with global warning．
| A．in relation to | B．in response to | C．in addition to | D．in opposition to |
Don’t be so discouraged．If yousuch feeling，you will do better next time．
| A．carry on | B．get back | C．put away | D．stick to |
—What are you busy with?
—The conferencein our city next week．
| A．held | B．will be held | C．being held | D．to be held |
—Someone might see us．
—？we are not doing anything illegal．
| A．what's up | B．what if | C．How come | D．so what |