单项选择题
A. when did you get back B. What a surprise I got C. How I admire you D. I am Tom E. got hold of F. got through G. this is Tom H. tried to contact you
A．An official of the UN. B．A coffee shop owner. C．A friend of the author’s. D．Alex’s friend from Californi
A．the US federal government B．mobile phone users C．the carriers themselves D．the law of the United States