23.【单选题】物质的唯一特性是客观实在性，“客观实在”是指（）。

What does ATC stand for?

How would you like me to ____ you for my error?

He has refused to offer us any help. Did you know about that?
- Yes, but I＇d like to ____ him to change his mind.

There are many reasons for a flight ____.

There will be some air ____ in 10 minutes. Please return to your seat and fasten the seat belt.

Passengers are required to be at the airport 2 hours ____ departure.

Because of this, the economy is ____ to get worse.

The pilot was seriously injured and the ____ would take over.

A ____ of 20,000 people came to the concert.

What＇s the ____ rate between US dollar and Pound?