—_____________________

—He is not available right now. Can I take a message?
选择一项:
a. May I speak to Mark?
b. Can I help you?
c. What can I do for you?
出自:理工英语1

完成拼图验证

按住下方滑块,将拼图拖到缺口处后松开。

拼图背景,将小拼图拖到缺口处
向右拖动滑块