giúp mình với Bài 5: Mỗi câu sau đây chứa một lỗi sai. Tìm và sửa những lỗi sai. 1. Average family size has increased from the Victorian era. 2. The riches in Vietnam are becoming richer and richer. 3. In 1892, the first long-distance telephone line between Chicago and New York was formally opening. 4. Dietitians urge people to eat a banana a day to get potassium enough in their diet. 5. Woody Guthrie has written thousands of songs during her lifetime, many of which became classic folk songs. 6. The development of transistors madepossible it to reduce the size of many electronic devices. 7. My father is a good family man, completely devoted for his wife and kids. 8. The price of gold depends on several factor, including supply and demand in relation to the value of the dollar. 9. Weather and geographical conditions may determine the type of transportation used in a region. 10. Those people were so friend that I didnt want to say goodbye to them.