tìm lỗi sai và sửa trong các câu sau 1.They work in offices where are air - conditioned 2. We all very agree that some tests are not difficult enough and others are just too hard 3. In the company of human beings, parrots demonstrate a remarkable talent for mimicry, for which they never use in the forest 4. I get up early, shower first, then I drink usually some tea and get dressed as fast as I can. 5. The first national known male singers of popular music appeared during the 1920s. 6. Martin was used to smoke a lot when ha was studying, but since he has been working in the bank, he hasn’t been smoking as much. 7. The Puffer is a type of fish that can inflate one’s body like a balloon. 8. The result of the evaluations and recommendations show that more effort needs to go into research. 9. The Louisiana Purchase, made in 1803 , almost was doubled the size of the United States. 10. Two meters are about the size of most doorways.