Điền một mạo từ (a/an/the) 1. We would love to visit ............Canada and ............... United States of America 2. Yesterday we went on.................eight -hour tour to Queensland 3. As I was walking along the street , I saw .............. 10 note on............. pavement 4. Of........... two films ,"Home alone"is ............. more interesting 5. When did .......... Stone Age end ?