单项选择题

Questions 11-13 are based on the following talk about napping, you now have 15 seconds to read questions 11-13. Children under five have abundant energy partly because they

A．sleep in three distinct parts.
B．have many five-minute naps.
C．sleep in one long block.
D．take one or two naps daily.

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单项选择题

单项选择题

Questions 11-13 are based on the following talk about napping, you now have 15 seconds to read questions 11-13. Children under five have abundant energy partly because they 您的浏览器不支持 audio 元素。