The old town has narrow streets and small houses _____are built close to each other.
| A．they | B．where | C．what | D．that |
In the last few years,China ___ great achievements in environmental protection.
| A．has made | B．had made |
| C．was making | D．is making |
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 |
_____the early flight,we ordered a taxi in advance and got up very early.
| A．Catching. | B．Caught. |
| C．To catch. | D．Catch |