单项选择题
What does the passage say about teenage boys and girls（）
A．Only one out of four girls cries less often than boys. B．Of four boys, only one cries very often. C．Girls cry four times as often as boys. D．Only one out of four babies doesn’t cry often.
单项选择题 What does the man mean（）
单项选择题 In what aspect do Betty and Abby differ from most twins（）
单项选择题 What does the passage tell us about twins who share parts of the same body（）
