1. Be careful or you'll spill the milk.
→ If you aren't careful, you'll spill the milk.
2. My sister grew sunflowers in the past, but she no longer does it now.
→ My sister used to grow sunflowers in the past, but she no longer does it now.
3. He thought the ending of the story is quite shocking.
→ He was quite shocked at the ending of the story.
4. What was the price of the entry fee?
→ How much did the entry fee cost?
5. Although she performed well, she didn't receive good comments from critics.
→ Despite her good performance, she didn't receive good comments from critics.
6. Although he is so young, he performs excellently.
→ Despite his young age, he performs excellently.
7. Tom's teacher found his result disappointing.
→ Tom's teacher was disappointed at his result.
8. We will solve the problem of energy shortage by using solar energy.
→ The problem of energy shortage will be solved by using solar energy.
9. This sauce hasn't got much flavor, has it?
→ This sauce is tasteless, isn't it?
11. That is not her invention.
→ That invention doesn't belong to her.
12. They will increase the tax on petrol to 15% next September.
→ The tax on petrol will be increased to 15% next September.
13. In spite of her intelligence, she cannot answer the question.
→ Although she is intelligent, she cannot answer the question.
14. Despite of her English name, she is in fact a Vietnamese.
→ Although her name is E, she is in fact a Vietnamese.
15. How far is it from Kon Tum city to Pleiku City?
→ What are the distances between Kon Tum city and Pleiku City?