_____ on the MSN，some people often use “88” for “goodbye”．
| A．When chat |
| B．When chatting |
| C．When chatted |
| D．When to chat |
The experiment the discovery of a cure for cancer.
| A．resulted in | B．resulted from |
| C．brought in | D．ended in |
The problem many children have out of school is getting more and more serious.
| A．that;dropped | B．which;got |
| C．of;fallen | D．as;run |
It won’t work:,it’s a bad idea,and secondly it’ll cost too much.
| A．above all | B．to begin with |
| C．first of all | D．at first |
The blame for this accident the man who destroyed the signal.
| A．was laid | B．was attached to |
| C．attached to | D．was put |
We can all his knowledge.
| A．benefit | B．benefit from |
| C．be good for | D．do good to |