The news that scientists so far haven’t found out the cause of bird flu discouraged some WHO officials,________?

Helen’s mother usually gets up _____ seven o’clock _____Sunday morning.[ ]

The little daughter has _____ for a long time. Her mother is trying waking her up now.

What are people supposed to do when they meet ________the first time? —They are supposed to bow. [ ]

My grandmother found watching TV _________ but I enjoyed it very much..