43. What does the word "confined" mean according to the passage？
(A) restricted
(B) trained
(C) remained
(D) obeyed

confined
把…局限在，限制
to limit an activity, person, or problem in some way
Let's confine our discussion to the matter in question, please!
Please confine your use of the phone to business calls.
By closing the infected farms we're hoping to confine the disease to the north of the region (= stop it from spreading to other areas).
（常指強制）關押，監禁，禁閉
to keep someone closed in a place, often by force
The hostages had been confined for so long that they couldn't cope with the outside world.

(A) restricted
受（尤指官方法規等）限制的，受約束的
limited, especially by official rules, laws, etc.
Building in this area of town is restricted.
Membership is restricted to (= it is only for) chief executive officers.
Our view of the stage was restricted (= objects prevented us from seeing the whole stage).
（某區域）限制出入的，實行管制的，不對公衆開放的
A restricted area is one that you need official permission to enter because the police or the armed forces want to keep it secret, or because it is considered dangerous.
Wellington Barracks is a restricted area and anyone who enters should have identification.

(B) trained 訓練過的，培訓過的，受過鍛煉的
having been prepared for a particular job or activity, by learning skills, getting qualifications, etc.
I didn't realize Emilio was a trained nurse.
Are you trained in the use of this equipment?
"Did I hear you say your children cleaned up after the party?" "Oh yes, I have them well-trained!"

(C) remained
停留，留下；保持不變，仍然是
to stay in the same place or in the same condition
The doctor ordered him to remain in bed for a few days.
Most commentators expect the basic rate of tax to remain at 25 percent.
 A great many things remain to be done (= have not yet been done).
He remained silent.
It remains a secret.
The bank will remain open while renovations are carried out.
剩餘；餘留；遺留
to continue to exist when other parts or other things no longer exist
After the flood, nothing remained of the village.
Only a few hundred of these animals remain today.

(D) obeyed
服從，順從；遵守，遵循
to act according to what you have been asked or ordered to do by someone in authority, or to behave according to a rule, law, or instruction
The soldiers refused to obey (orders).
遵守，遵循（科學定律）
to behave according to a scientific principle
Falling objects obey the law of gravity.
（身體或身體某部位）聽從使喚
If your body or part of your body does not obey you, it does not work in the way it should.
She was so tired her legs just wouldn't obey her any longer.

資料來源：劍橋辭典