Why did Danielle fax Melissa?
A．To sign up his son for the event
B．To share her volunteer experience
C．To offer to help
D．To express gratitude

A.To
B.To
C.To
D.To

【参考答案】

C
解析：(A)“为儿子报名”、(B)“分享做志愿者的经历”和(D)“表达谢意”均与原文内容无关。