一The summer vacation is coming．Do you have any ideas about the coming vacation?－I 　　volunteering in the old people’s home．What do you think of it?

-The flight to London was          because of the heavy snow.

 Cai Qin has given concerts all over China and the tickets have always_______.

We would like to _______ some money _______ the poor children in our country.

Rather than _________ on a crowded bus, he always prefers __________ a bicycle.