The university graduates from ordinary families are often left with nothing but diplomas， those from wealthy ones can "gnaw" （啃老）on their parents' money and networks to get ahead.
| A．while | B．when | C．which | D．Although |
The girl arranged to have piano les-sons at the training centre with her sister __________ she would stay for an hour.
| A．where |
| B．who |
| C．which |
| D．what |
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 |