— Must we go to see a doctor at once when we have the flu?—No,_____.A. we mustn’tB. we shouldn’tC. we don’t have to
The old man lives ___________ , but he never feels ___________.
—Do you know mother giant pandas have only one or two babies ___________? — Sorry, I don’t know.
— Is this maths problem ___________? — Yes, I can work it out ___________.
— ___________does your sister walk her dog? — Once a day.
— Would you like to climb the hill with us tomorrow? — If it ___________ ,I ___________.