________ by the advances in technology, many farmers have set up wind farms on their land.
| A．Being encouraged | B．Encouraging | C．Encouraged | D．Having encouraged |
Do you know the police ______ searching for a thief in the woods now ?
| A．is | B．are | C．was | D．were |
When he was young, his parents died and he had to _____ himself.
| A．accept | B．support | C．carry | D．weigh |
Whether life will continue on the earth will depend on _______ this problem can be solved.
| A．that | B．which | C．whether | D．If |
Only when it is hungry______ a human being.
| A．a lion will attack | B．a lion would attack |
| C．will a lion attack | D．would a lion attack |
In such a cold day, people prefer to stay at home _______ go out.
| A．other than | B．less than |
| C．more than | D．rather than |