11.【单选题】“此亦一是非，彼亦一是非”的观点是：（）

Are passengers allowed to store some of their luggage inside the aircraft?

Which part of the aircraft is not accessible to the passengers?

The ____ is the area where food of the passengers is prepared.

When are the passengers required to wear a seat belt?

What is the part of the aircraft where passengers are seated called?

It took me a while to ____ this word in this thick book.

____ passengers do not have to go through customs.

It took him a full day to ____ those bags.

The captain needs to be ____ of this.

I am terribly sorry I can＇t ____ your invitation due to my business.