Sử dụng giói từ đúng: 1. This counterfeit Iphone is made .... China. You were cheated. 2. On behalf __________ my class, I would like to show my own opinion. 3. The telephone was invented __________ a Scottish inventor, Alexander Graham Bell. 4. You should make contact __________ our company as soon as possible if there is something wrong. 5. She is making __________ story. Don’t believe her. 6. This project will be carried _________ next month.