单项选择题

In the second paragraph, Nelson says that an active woman in her 20s ______

A．must be careful when taking 2,500 calories a day
B．should try to get 2,500 calories a day at least
C．must lose weight if taking in 2,500 calories a day
D．cannot do without a minimum 2,500 calories a day

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单项选择题

Stop worrying about counting things and worry about taste and eating means ______

A．when one is in one's teens, one should eat things one does not like
B．one should be more aesthetically conscious while eating things
C．nutrients may be gained from one's riotously colorful plate of food
D．one does not have to care too much about what to eat when young

单项选择题

Which of the following statements is true, according to the passage

A．Andrew Carnegie was successful in his bold investments.
B．Andrew Carnegie put all his money into one basket for safety.
C．Andrew Carnegie became wealthy by merging his companies.
D．Andrew Carnegie made his first investment in the steel industry.