–Whose notebook is this? Is it Julie’s? –It _________be hers, she has gone to Beijing. A. must B. mustn’t C. can’t
I felt it hard to keep up with my classmates. But whenever I want to ____________, my teacher always encourages me to work harder.
— How long have you ________? — For three days.
— You don’t look well, Don! You’d better see your doctor. — I ________, but he said there was nothing wrong.
—Can I help you? —I’d like ____________ for my twin daughters.
—____________ will you be away? —In a couple of weeks.