Scientists are increasingly _____ that the earth is getting hotter because of carbon dioxide and other gases. 

Henry said he stayed at home all day, but I saw him in the supermarket. It’s __________that he was lying.

 In today’s fast changing and competitive world, to be able to learn faster and more effectively is not merely desirable; it is ________.

 I am ______ about the new model, and I firmly believe that there will be a good market for it. 

 Exercise is__________ as any other to lose unwanted weight.