Mr Green is fond of rock music,___________his wife has no interest in it at all．
| A．however | B．while | C．as | D．unless |
Every means ______ tried but without much result.
| A．has been | B．have been | C．are | D．is |
______ is to attend our evening.
| A．both the singer and the dancer | B．Either the singer or dancers |
| C．The singer or dancers | D．The singer and dancer |
If you keep __________ English, you can learn English well.
| A．practising speak | B．practising speaking |
| C．practising to speak | D．to practise spoken |
__________ the assignment made his father lose his temper.
| A．The boy’s not having done | B．The boy not having done |
| C．The boy’s having not done | D．The boy having not done |
With the improvement of people’s living conditions, most mothers _______ in hospitals.
| A．have delivered their babies | B．have born their babies |
| C．have their babies born | D．have their babies delivered |