He tried to tell himself to keep calm instead of being angry. It is________

Mr. Smith has ___collection of coins than anyone else I have ever met.

 If the price of oil remains ________ for the rest of 2013, I will consider buying a new car.

For our middle school students, some courses are compulsory, while others are ________.

As a couple ,the Smiths can always make the _____ decision to work through their problems