Some pre-school children go to a day care centre, _______ they learn simple games and songs.
In the last few years,China ___ great achievements in environmental protection.
Opposite is St.Paul's Church,___you can hear some lovely music.
The park was full of people,____themselves in the sunshine.
--Did you enjoy the party? --Yes,we___by our hosts.
_____the early flight,we ordered a taxi in advance and got up very early.