Beijing was attacked by such a terrible sandstorm ______few citizens had ever experienced before.
| A．and it was | B．as | C．that | D．which |
American Indians about five percent of the US population
| A．fill up |
| B．bring up |
| C．make up |
| D．set up |
We cannot figure outquite a number of insects, birds and animals are dying out.
| A．that |
| B．as |
| C．why |
| D．when |
They decided to turn to can help them out of difficulty.
| A．whoever |
| B．who |
| C．anyone |
| D．someone |
See the flag on the top of the building. That waswe did this morning.
| A．when |
| B．which |
| C．where |
| D．what |
He will a doctor in the future.
| A．make; promises |
| B．become; promising |
| C．make; promised |
| D．do; promising |