俄罗斯大部分地区地形比较平坦，下列平原主要位于俄罗斯的是（ ）
A：东欧平原、西西伯利亚平原
B：东欧平原、西欧平原
C：亚马孙平原、西西伯利亚平原
D：恒河平原、东西伯利亚平原
____，水随天去秋无际。（辛弃疾《水龙吟·登健康赏心亭》）
Manners in a dinner party
What to take
You can bring some drinks like ____ juice, beer or something like these.
When to arrive
You should arrive on time or no more than ____minutes late.
If you'll be fifteen late, you should give the host a ____.
What to do at the table
Try to be relaxed and ____ at the table. If you can't use the knife and ____ , you can watch others.
