在航空运输中，承运人之间交接货物、文件的凭证是（）。
A、分运单
B、主运单
C、舱单
D、转运舱单
参考答案：D
根据图片内容，填入适当介词
1. I like running _____ the mormng.
2. There is an orange _____ the desk.
3. We will meet _____ eighto'clock.
4. An eraser is _____ the pencil case.
5. Sometimes I can't sleep _____ night.
6. Tom is _____ his bike.
