单项选择题

Why are the lions in the Git Forest especially vulnerable to disease

A．They are physically weaker than the African lions.
B．They are small in size.
C．They do not have enough to eat.
D．They have descended from a dozen or so ancestors.

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单项选择题

The author implies that ______.

A．social agencies in America can be very helpful
B．the help to American families from social agencies is limited
C．the government should do more to improve patchwork programs
D．the fragmentary nature of the American family is unique

单项选择题

What is said to be the major problem facing young couples______.

A．They need to fulfill more duties.
B．They are incapable of balancing the budget.
C．They have their children spoiled and overindulged.
D．They get empty-handed after divorc