The man preferred ______ in the room to read to ______out for a walk.

--- I am going to visit the Shanghai EXPO this summer. Will you come with me? ---- Thanks. I’m afraid lots of people are planning for that. I prefer to stay at home rather than___   _ there.

 ________ mud on his trousers brushes off easily.

During the dialogue with Chinese youth in Shanghai, President Obama announced the U.S. would expand the number of students to study in China to 100,000 _______ ties between the two countries.

______ sweet and fresh, this kind of food is so popular with local people and the tourists.