11.【单选题】“人不能两次踏进同一条河流”主要说明运动和静止的关系是（）

Take a deep breath and ____ yourself.

The ____ of the building is on the left.

Have you ____ your plan yet?

In most countries, liquor stores do not sell ____ to children under 18 years old.

Tables are set with china and gold-banded silver ____.

This is a ____ subject so please talk about it carefully.

Due to emergency, we have to ____ the meeting to a later time.

He doesn＇t want to ____ in political affairs.

A flu ____ is sweeping through Moscow.

By convention, you should follow this ____.