旅客车票背面应印有（）。
A.旅客须知
B.乘车须知
C.旅客乘车须知
D.铁路旅客乘车须知
参考答案：D
—I called you yesterday evening, but there was no answer.
—Oh, I’m sorry. I ________ dinner in my friend’s home.
A．have
B．will have
C．was having
D．have had
一个企业一般来说有几个胜任模型？（）
A、一个
B、不止一个
C、十个
D、五个
