7、        the United States is one of the most developed countries, it does not guarantee health care for all. The government provides coverage only for old people and the poor.

A．Since               B．While        C．If             D．As

7、B

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        the United States is one of the most developed countries, it does not guarantee health care for all. The government provides coverage only for old people and the poor.

A．Since               B．While        C．If             D．As

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