单项选择题

SECTION A CONVERSATIONS In this section you will hear eight statements. At the end of each statement you will be given l0 seconds to answer the question. How many children in the United States suffer from the disorder

A．More than 25%.
B．Less than 25%.
C．One out of five.
D．One fourth.

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单项选择题

单项选择题

SECTION A CONVERSATIONS In this section you will hear eight statements. At the end of each statement you will be given l0 seconds to answer the question. How many children in the United States suffer from the disorder 您的浏览器不支持 audio 元素。