_______ leaves the room last ought to turn off the lights.
| A．Anyone | B．The person |
| C．Whoever | D．No matter who |
_________ the task , they have to stay there for another two weeks.
| A．Not completing | B．Not completed |
| C．Not having completed | D．Having not completed |
Visitors were struck by the natural _________ here, which was beautiful beyond description.
| A．resource | B．scenery | C．disaster | D．element |
If you don’t explain clearly, you will just _______ the reader.
| A．confuse | B．satisfy | C．intend | D．remind |
Gun control is a subject ________Americans have argued for a long time,
| A．of which | B．with which | C．into which | D．about which |
Before the tourists set off , they spent much time setting a limit _____ the expenses of the trip.
| A．in | B．for | C．to | D．about |