His conduct was very good. All his teachers love him

11. his conduct was  very good. all his teachers love him

12. Lan’s voice is very beautiful .we like to hear her sing

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13. Nam is still weak . he can’t walk without a stick

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14. My father’ health is good . he seldom takes any medicine

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15. There is a lot of noise . we can’t learn our lessons

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16. My friend is very strong .  he can lift up a table himself

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17. Bill is  an intelligent boy  . he is always at the top of the class

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18. The students behaved badly .  the teacher was absent from class

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19. Mr Hai had a lot of children. they formed their own football team

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20. This home work is difficult . I never finish it

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