题目内容：

More and more people, especially in developed countries, arc becoming older. In the United States there are currently over 40 million people aged 65 and over, more than 10 million are over 85. Caring for these senior citizens is becoming a necessity, and a big industry.

    Traditionally, care for the elderly has taken place in an extended family, where grandparents live at home and are helped by other family members. However, as more and more young people enter the work force full time they cannot care for their parents or grandparents any more. There are more than 10,000 organizations that provide care for the elderly. More than 1,000 were founded last year alone. Ordinary people quit their jobs and start private care centers, where they offer senior citizens their services.

    One of the most difficult aspects of such an organization is finding the right people to do the job. Caring for the elderly is not an easy task. It requires skill and patience. Among daily tasks are preparing meals, washing older people, or simply keeping them company. Many care workers quit because they find it very depressing(令人沮丧的). It is important to help the elderly stay mobile as long as possible. When they cannot walk or climb stairs they need more help: thus costs become higher. Care workers concentrate on exercises to help them stay mobile. In many cases assisted living replaces round-the-clock health care. Elderly people need help with some daily tasks but can mostly live on their own. It also costs less than full nursing care.

    While wealthy Americans turn to private care centers, those who are poorer cannot pay for the services because Medicare does not cover it. Not all countries offer health care provided by the state. In Asia and Africa, for example, older people are cared for by family members.

1.Why are more and more private care centers started?

A. Many people can't find other jobs.    B. Caring for the elderly is an easy task.

C. Many young people take full time jobs.    D. Care workers can get well paid.

2.Who pays for the service in the care center?

A. Medicare.    B. The state.    C. The family.    D. Care centers.

3.What is the third paragraph in the text mainly about?

A. Reasons to start a care center.    B. Skills that care workers need.

C. Costs for nursing care.    D. Difficulties in running a care centre.

4.How many daily tasks for nursing care are mentioned in the text?

A. Three.    B. Four.    C. Five.    D. Six.