This washing machine is environmentally _______ because it uses less water and electricity than older models.
| A．friendly |
| B．various |
| C．common |
| D．changeable |
Stephen Hawking believes that the earth is unlikely to be the only planet __________ life has developed gradually.
| A．that |
| B．where |
| C．which |
| D．whose |
Children who are not active or __________ diet is high in fat will gain weight quickly.
【选项 】
| A．what |
| B．whose |
| C．which |
| D．that |
I refuse to accept the blame for something __________ was someone else's fault.
| A．who |
| B．that |
| C．as |
| D．what |
The old town has narrow streets and small houses __________ are built close to each other.
| A．they |
| B．where |
| C．what |
| D．that |
You'll find taxis waiting at the bus station __________ you can hire to reach your host family.
| A．which |
| B．where |
| C．when |
| D．as |