A.Hello,B.Hello,C.C.Speaking.D.Hello,D.Speaker A: Hello……
Speaker A: Hello, may I speak to Alan Bright? Speaker B: ______
A.Hello, may I ask who you are?
B.Hello, please wait for a moment and I'll go to call him.
C.Speaking.
D.Hello, I'm Alan Bright.
A.Hello,
B.Hello,
C.
C.Speaking.
D.Hello,
D.