排序，用数字填写序号(t/]+V7~*d7G
'_,N0n-L4n.c7J.T-Y*S5H;t3l4V3O/i A. Good afternoon, Mike.(t/]+V7~*d7G
8q5I)e2U.M7A1}0? B. He’s Liu Tao. He’s my friend.(t/]+V7~*d7G
-B9h,E:t C. Hi, Liu Tao.(t/]+V7~*d7G
6P8x.o1@/k D. Good afternoon, Wang Bing.(t/]+V7~*d7G
9k9R9];`1L E. Hi, Mike.(t/]+V7~*d7G