______ is it from Olympic Center to your school — It’s about 10 minutes’ walk.

Polar bears liveon sea ice，which they use as a platform for hunting seals

How’s the weather there— __________. I have to stay at home.

23Nowadays, children always complain that their parents are out of date, ______ parents can’t approve of what their children say and do

There are_____ large number of peoplethere, so we soon lost____ sight of him.