–Who is the man over there ? Is it Mr. Li? --No, it_____be him . Mr. Li is much taller.A. mustn’t B. may not C. can’t
—____she is very tired, ____Sue doesn’t stop working.
—Are you busy this weekend? — Yes, my mother wants me ____the house.
—_____do they go to movies? — Once a month.
—I think______is not easy to draw this picture. —I think so.
—What’s the weather like in Qinghai in winter? —There is ________snow and it is ______cold.