After a whole day’s heavy work ,the old worker returned home ,______________________.

Would it be ___ for you to pick me up at four o’clock and take me to the airport? 

You job here is only _____, for you will be removed from it when we have a proper post for you．

 Whether the buildings in this area should be pulled down has remained ________; people are still looking for other possible solutions.

The kid is not ______ to work out the problem, for it’s too difficult.