单项选择题

Some environmentalists warn that the soaring population will cause ______.

A．the degradation of people's living standard in the next century
B．the deterioration of living environment in the next century
C．the reproduction of more wild species in the next century
D．the extinction of more wild species in the next century

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单项选择题The example in paragraph 8 indicated that ______.

A．the local people do not mind conserving the natural environment
B．the local people should further control the rise of population
C．the increase of local population led to the decrease of biodiversity
D．the increase of individual households led to the decrease of biodiversity

单项选择题Researchers state that ______.

A．larger families are more efficient in consuming natural resources than smaller families
B．both larger and smaller families need the same amounts of natural resources
C．smaller families are more extravagant in living
D．larger families are more frugal in living

单项选择题Biologists report that the biodiversity is decreasing because ______.

A．more individual households are increasing greatly
B．human beings are threatening many wild creatures
C．human populations have been decreasing in recent years
D．wild creatures depend on more individual households

单项选择题The passage mainly tells us that ______.

A．the increase of human population leads to more destruction of the natural world
B．the decrease of animal population results from the dwindling biodiversity in the natural world
C．the planet's biodiversity is also related to the number of households
D．the planet's biodiversity relies on the balanced increase of larger and smaller households