单项选择题

Speaker A: I wonder if Ann will come. It"s 8:30 now and she was supposed to come at 8:00.
Speaker B: ______

A.She assured me she would start at 7:30. Maybe she had been held up by the traffic.
B.You shouldn"t be wondering. I believe she won"t come.
C.Don"t worry. Let"s wait here until she comes.
D.Yes. I do agree with you.