-----Are you pleased with the play? ------Not at all. It couldn’t have been___.
—Why can your neighbor know so much about London? —He ____ have been there before.
The new teacher made a good ____ on the students by her rich knowledge and humorous talk.
My parents live in a small village. They always keep candles in the house ____ there is a power out.
—What do you think of his opinion? —Nobody has given me _____ piece of advice.
What is the way George thought of _______ enough money to buy the house?