《运营管理手册》中饮水规定：非就餐时间，饮水间最多只能有（）人同时饮水。
A、2人；
B、3人；
C、4人；
D、5人.
参考答案：C
--Did you listen to the speech?
--- No, we ______ it. But we had a lot of traffic on our way.
A．could have attended
B．must have attended
C．could attend
D．shouldn't have attended
世界上最低的盆地是（）
A、吐鲁番盆地
B、四川盆地
C、柴达木盆地
D、准格尔盆地
