–I don’t understand ____. --I’m sorry. But I was doing my homework.
—Could we go and watch the football game?—No, ________you have the tickets.
The tour guide has made the route for the school trip. We don't need to_______ that.
—How do you communicate with your foreign friends?—________writing emails, of course.
—Could you tell me how to remember new words quickly?—Yes, I think a ________tree can help you a lot.
— Mom, I was the first to reach the top of the mountain.— Good job, Charlie. I’m ______ of you.