—Must I turn off the gas after cooking ? —Of course . You can never be _______ careful withthat.

----- Hi, Mark. How was the musical evening? ----- Excellent! Ales and Andy performed _________ and they won the firs prize.

.I hope I will not be called on in class as I’m not yet____prepared．

—I don’t like shopping.         — Me______. It makes me tired. 

There is ____ nothing interesting in his speech.