单项选择题

Questions 14—16 are based on the following passage about education in the United States. You now have 15 seconds to read Questions 14—16.
At what age do the most children start school

A．At 7.
B．At 6.
C．At 5.
D．At 8.

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单项选择题

单项选择题

Questions 14—16 are based on the following passage about education in the United States. You now have 15 seconds to read Questions 14—16. At what age do the most children start school 您的浏览器不支持 audio 元素。