Exercise 2: If a sentence is correct, put a ✓. If there is a mistake in a sentence, underline and correct it. 1. It was the best perform I have ever seen. 2. Unfortunately, the fire was discovered soon after it had started. 3. He's always done his job really well. 4. Lan failed the exam because of her lazy. 5. The road was too narrow, so they had to wide it. 6. Football is one of the most popular sports in Vietnam. 7. We always guarantee the safe of our passengers. 8. It hasn't rained for a long time, so there's a shortage of water now. 9. I don't earn enough money to buy new clothes regular. 10. The main square was crowd with people. 11. Ao Dai is traditional costume of Vietnamese women. 12. I had great difficult in learning a foreign language. 13. To me, health is more importance than money. 14. I usually feel sleepily after lunch. 15. Pam will always support you. She's the most unreliable person I know.