So________ was the boy in the game he was playing online that he could feel neither sleepy nor hungry.
It is hard to say what kind of person he is. Sometimes he is very friendly; at other times he _______ be very cold.
In my opinion, _______ matters is not one’s looks, but one’s inner thoughts.
What a table! I’ve never seen such a thing before. It is _______ it is long.
— How long do you think it will be _______ the USA recovers from the losses of the financial crisis? — Perhaps four or five years.
Listening attentively in class and reviewing in time _______ a sure way to improve your learning, and this is especially true _______ it comes to standard tests.