单项选择题
Why does a child cry when his mother tells him to have an apple after lunch（）
A．Because he is being difficult. B．Because he understands what “not now” really means. C．Because he understands he will never have it. D．Because he knows his mother is cheating him.
单项选择题 According to the writer, adults and children differ（）
单项选择题 People used to believe that（）
单项选择题 In this passage, the writer tells us （）
