1.Social activities (保护) old people from the loneliness.
【答案】 preserve
2.Money and other forms of help will be offered to the (受害者) of the flood.
【答案】 victims
3.The doctor noticed a (逐渐的) improvement in his patient.
【答案】 gradual
4.Many a person (目睹) the car accident.
【答案】 witnesses
