---Why you are so worried? --- I ___for my little son all the afternoon, I don’t know why he hasn’t come back so late.
--- What do you think of _____opening ceremony of the Guangzhou Asian games? ----It was _____magical and memorable sight.
---Why don’t we go to the new Sichuan restaurant for a meal? -----_____
-----_____ leave at the end of this month. -------I don’t think you should do that until _____ another job.
He tried his best to solve the problem, _____ difficult it was.
The missing boy was last seen_____ near the East Lake.