(2013·潍坊市高三二模)As we all know, ________ medical examination will help us find our health problems as early as possible.

The audience were so ______ by his humorous performance that they kept laughing all the time. 

The long speech given by that old professor seemed _____ and endless. He felt so _____ that he nearly fell asleep.

With the debt problem worsening, it is going to be a ______ test for EU to help Greece out of trouble.

Those T-shirts are usually $35 each, but today they have a ______ price of $ 19 in the Shopping Centre.