The scientists are trying to ___ natural energy to decrease air pollution.
| A．make friends with | B．make full use of | C．make notes of | D．make into |
The man _______ around our school is from America.
| A．which you showed |
| B．you showed him |
| C．you showed |
| D．where you showed |
The doctor_______ is leaving for Africa next month.
| A．the nurse is talking to him |
| B．whom the nurse is talking |
| C．the nurse is talking to |
| D．who the nurse is talking |
The man _______ you are going to make friends is my father’s neighbour.
| A．with whom |
| B．when |
| C．to whom |
| D．which |
The man _______ you talked just now is a worker.
| A．who |
| B．whom |
| C．to whom |
| D．to who |
Who is the woman _______ is sweeping the floor over there7
| A．who |
| B．\ |
| C．that |
| D．when |