May I speak to Alex? __
A.This is Alex speaking
B.I am Alex speaking.
C.Who are you?
D.That is Alex speaking.
出自:中国医科大学-英语

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