We _______ on it for several hours but we have not yet reached any conclusion.
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?
—Some wine?—Thank you. _______. I have to drive home.