I ___have written to him because he phoned me shortly afterwards.
| A．ought to | B．must | C．couldn’t | D．needn’t |
In the last few years,China ___ great achievements in environmental protection.
| A．has made | B．had made | C．was making | D．is making |
He is a shy man,___he is not afraid of anything or anyone.
| A．so | B．but | C．or | D．as |
Opposite is St.Paul's Church,___you can hear some lovely music.
| A．which | B．that | C．when | D．where |
The park was full of people,____themselves in the sunshine.
| A．having enjoyed | B．enjoyed | C．enjoying | D．to enjoy |
—Did you enjoy the party?
--Yes,we___by our hosts.
| A．were treated | B．would be treated. |
| C．treated | D．had treated |