Now, the world’s focus is all on Shanghai ______ the 2010 world Expo is to be held.
| A．when | B．whose | C．where | D．that |
________much advice I gave him, he did exactly what he wanted to do.
| A．How |
| B．Whatever |
| C．However |
| D．No matter |
The research is so designed that once________nothing can be done to change it.
| A．begins |
| B．having begun |
| C．beginning |
| D．begun |
Visitors________not to touch the exhibits.
| A．will request |
| B．request |
| C．are requesting |
| D．are requested |
It is known to all that________you exercise regularly, you won't keep good health.
| A．unless |
| B．whenever |
| C．although |
| D．if |
—What would you do if it________tomorrow?
—We have to carry it on, since we've got everything ready.
| A．rain |
| B．rains |
| C．will rain |
| D．is raining |