It is clear that the whole world is passing through a social revolution in which a central _____ must be taken by scientists and technologists.
| A．process | B．attention | C．measure | D．part |
Tom asked the candy makers if they could make the chocolate easier __________ into small pieces.
| A．break |
| B．breaking |
| C．broken |
| D．to break |
What he did in the supermarket showed the respect for the __________ of the disabled.
| A．dignity |
| B．ambition |
| C．breath |
| D．absence |
She offered me practical __________ with my research, for which I would appreciate for my whole life.
| A．conduct |
| B．certificate |
| C．admiration |
| D．assistance |
You can never imagine what great difficulty I had __________ the poor boy who was trapped in the earthquake.
| A．helping |
| B．to help |
| C．help |
| D．helped |
Tom's father doesn't __________ of him joining the army.
| A．allow |
| B．agree |
| C．approve |
| D．let |