The U. S．declares it has the best medical technology in the world，but quite a lot of Americans have no __________to health care service．

 Do you have enough        to prove that you are right?

We walked a couple of blocks, looking in _______ for a taxi. How disappointed we were!

It was difficult to guess what her _____ to the news would be.

Whenever he meets difficulties, he always takes a positive _________ towards them.