Something must be done to stop cutting down trees. ________ all the trees are cut down, the valuable soil will be washed away by the heavy rain.
| A．Whether | B．Unless |
| C．Once | D．Until |
The story of his life _____ interesting.
| A．is sounded | B．is sounding |
| C．has sounded | D．sounds |
The dish _____ nice, but the milk _____ sour.
| A．is smelt, is smelt | B．is smelt, smells |
| C．smells, is smelt | D．smells, smells |
The new school has been completed. It _____ very beautiful.
| A．is looked | B．looked |
| C．has looked | D．looks |
Her forehead _____ hot. I’m afraid she is ill.
| A．is feeling | B．felt |
| C．is felt | D．feels |
“Do you like the material？” “Yes, it _____ very soft.”
| A．is feeling | B．felt |
| C．feels | D．is felt |