To understand the complex situation completely requires more thought than ________ so far.

---- It is demanded that the letter ___by the end of this week , dad !----I’ll do it immediately . 

For the past year, he ______ a flat with others and trying to save money to open his own business.

 This is his only request that the room ______ after being used．

Everybody in our hometown, men and women, young and old, ____sports and games.