cứu tôi hả..........

`18. A`

- D/c : They can be seen searching the rubbish heap for a meal ... sexually abused.

`->` badly physical and mental conditions : tình trạng thể chất và tinh thần tồi tệ.

`19. A`

- D/c : Volunteer Work in the Street Children Programme in Delhi, India consists of taking informal education classes with the children, playing games with the children and introducing them to different new activities. Volunteers can teach the children good habits such as cleanliness, hygiene and greetings.

`->` Không có ý của đáp án `A` trong câu.

`20. C`

- D/c : Such educational trips are very useful for the children where they love spending time and playing with the volunteers.

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