Bài 15:
1. She's in hospital because she had an accident.
2. They don't work many hours but they have much money.
3. Paul asked me a question, so I replied.
4. I buy tomatoes, peppers and potatoes.
5. She can have an apple or a mango. She can't have both of them.
6. Karthik can play the piano but he can't play the violin.
7. She is very hard-working but her brother is lazy.
8. She is clever and beautiful.
9. You can take the blue shirt or the green shirt.
10. My sister is tall but I am short.
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