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IX/
1. People have built the house since 1911.
2. Are you fond of walking in the rain without wearing a raincoat?
3. He is the most marvelous boy I have ever met.
4. Do you like to spend free time playing tennis with me?
5. If you give up smoking, your health will be better and better.
6. My father bought a motorbike which cost two thousand dollars.
7. Seeing the mother, she burst into tears.
8. Phong is one of my best friends that learned the same class as me ten years ago.
9. He has to have responsibility for the pollution which his company caused.
10. Only by doing a lot of grammar exercises will you improve your English.
X/
1. Do you think Nga will be able to find our house?
2. What time did you arrive at the stadium?
3. By the way I think, we need to grow some flowers in our garden.
4. If we cut down more trees, there will be more floods.
5. Could you tell me how to get to the City Exhibition, please?
