Pine trees, of which there are almost one hundred ____, are found throughout the North Temperate Zone.
| A．species | B．samples | C．specimens | D．Standards |
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 |
You have made a few spelling mistakes in your composition, but it is well written .
| A．on a whole |
| B．as a whole |
| C．generally speaking |
| D．as the whole |
Why! I have nothing to confess.you want me to say?
| A．What is it that |
| B．What it is that |
| C．How is it that |
| D．How it is that |