Gun control is a subject ________Americans have argued for a long time,
| A．of which | B．with which | C．into which | D．about which |
In the following days，Xiang Linsao told the story of her son________，and people were tired of that.
| A．sometimes |
| B．once more |
| C．again and again |
| D．again |
When I arrived I saw the place was already________by two strangers in uniform.
| A．occupied |
| B．conquered |
| C．possessed |
| D．owned |
Many difficulties have________as a result of the changeover to a new type of fuel.
| A．risen |
| B．raised |
| C．arisen |
| D．arrived |
Bob said he was going to________himself to a vacation in the mountains because he had been so tired.
| A．press |
| B．add |
| C．touch |
| D．treat |
—Is there anything else to discuss?
—________， I guess.
| A．Not at all |
| B．No，that's all |
| C．Yes, I 'm sure |
| D．Yes, of course |