-Can I smoke here?
-Sorry. We don't allow ______ here.
| A．people smoking |
| B．people smoke |
| C．to smoke |
| D．smoking |
David was always ______ his best in any danger, but at that moment he froze.
| A．at | B．in | C．for | D．on |
As the spokeswoman said, ______ we should take action against them depends on what they will do.
| A．why | B．if | C．whether | D．that |
In the reading room, we found her _______at the desk, with her attention ______on a book.
| A．seated; fixing | B．to sit; fixed | C．seated; fixed | D．seating; fixing |
With more forests being destroyed, huge quantities of good earth _______each year.
| A．is washing away | B．is being washed away |
| C．are washing away | D．are being washed away |
The prisoner was released early because of good ____________.
| A．conduct | B．praise | C．comment | D．condition |