单项选择题

What is the main idea of this passage

A．Obesity is now a global problem that needs tackling.
B．The weights increase fast throughout the whole world.
C．Obesity and starvation are two main problems in the poor world.
D．Obesity has shifted front the rich world to the poor world.

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单项选择题

Of tackling obesity in the poor world, we can learn from the passage that ________.

A．the matter is so complex as to go beyond our capacity
B．no matter what we do, the prospect will always .be bleak
C．it is starvation, the real threat, that needs to be solved
D．we should take immediate actions before it becomes incurable

单项选择题

According to this passage, the practice of sex selection ________.

A．can help to prevent all genetic problems
B．is totally unacceptable to ethics experts
C．was already realized five hundred years ago
D．will benefit families with certain inheritable diseases