单选题
The passage is mainly about ______.
A、
the importance of diet
B、
the need of iron
C、
adolescents' eating habits
D、
blood hemoglobin
【正确答案】
B
【答案解析】
见文章第一段第一句:How do we get more young people to increase their consumption of iron-rich foods?而文章的下文则就这个问题展开了论述。
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