_____ on the MSN，some people often use “88” for “goodbye”．
| A．When chat |
| B．When chatting |
| C．When chatted |
| D．When to chat |
His best-known work that is ___ all praise can be seen in the museum．
| A．with | B．beyond | C．without | D．within |
Europe has achieved more in controlling the AIDS virus than Asia in the past ten years, _________ the number of people infected with the virus is going up sharply．
| A．when | B．that | C．so that | D．where |
For most Americans, their 18th birthday the end of one part of their life and beginning of another．
| A．predicts | B．tells | C．marks | D．signs |
It ______ heavily when he got back home for he was wet all over．
| A．was raining | B．must have been raining |
| C．must be raining | D．rained |
—Very little use was _____ the waste water in the past．
| A．made of | B．make from | C．made up | D．make into |