Exercise 5. Mỗi câu sau đây có một lỗi sai. Tìm và sửa chúng. 1. At present, I'm work as a teacher in a secondary school and I plan to work here for 2 or 3 years before going to Australia to study. 2. Fire are one of the most important inventions in history. 3. Beyoncé was now a very well-known all over the world and she has released several albums in her singing career. 4. In the future, I came back to Indonesia to work after having a long vacation in Japan. 5. They haven't seen each other since a long time.
