The elderly need special care in winter, as they are _____ to the sudden changes of weather. [ ]

Her attitude to the party is __________ She said she liked it but she refused to attend it. [ ]

The Great Wall is __________ tourist attraction that millions of people pour in every year.

The terrible earthquake in Yushu, ________so many buildings, made many people homeless. [ ]

Are those your parents—_______. They are my uncle and aunt.