eens are smoking in Beijing, ______ the number of primary and middle school students picking up the habit has more than doubled from previous years.

Everyone __________go through the security check（安检） when entering the Bird’s Nest stadium.

Hot ______ the night air was, we slept soundly after the long tiring journey.

Always doing the same thing is really very_____ .

The shopkeeper gave us ______ weight: we got 9 kilos instead of 10 kilos. [ ]