F/HF组合电台，单边带无线电话采用的工作类型是（）.
A.J3E
B.AIA
C.H2A
D.FIB
参考答案：A
---What were you doing at this time last night?
--- I _________ a phone call.
A．made
B．will make
C．has made
D．was making
