There are six other cities that will host events for the 2008 Olympics ______ Beijing.

下列各句中，加线词语使用正确的一项是(　　)

o teaching, as we know, contributes to his popularity with his students.

We won’t give up ______________we should fail ten times

Great changes _____ in my hometown in the last 30 years and local people are living a happy life today.