1. Although Minh is poor , he stills helps the orphan.

2. Mai advised her to have a holiday after hoa's examination . 

3. You are not allowed to walk on the grass.

4. I don't mind looking after your dog when you go on holiday.

5. It was a kind of computer that i was not familiar with.

6. The bus was so crowed that i couldn't get a seat.

7. Jack would rather me not to say anything about the missing money.

8. If you happen to find my wallet , could you let me know ?

9. By the time he had read the book , he knew what the answer was

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