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

The illness of her son is so ______ that she cannot go to sleep at night.

It was really _____ of your brother not to play the guitar while you were preparing your lessons.

-----How did you think of the job he did last week ?-----Well done. ______. 

Although he is old, he’s very          . However, when he was young, he was very lazy.