It is good manners to eat up_______is left in your plate.

Most of us found ______ difficult to finish the work in such a short time.

To British people，Canadians may sound American; to Americans，they may sound British.  Canadians themselves insist on not being identified with       .

We are confident that the step the Chinese government has taken to cope with the current crisis is ______ of great significance.

 They want to make _______ clear to the public that they are doing an important and necessary job.