When Sabila threw the chair into the crowd, there was pandemonium. This means that A. many people were seriously wounded. B. everybody ran away. C. there arose a scene of great noise and confusion. D. Sabila was really mad.

Here are the solutions to the questions:

21. Ada affirmed that Etim got his appointment through the backdoor. This means that Etim got the appointment through unfair means.
"Through the backdoor" is an idiom meaning by secret or dishonest means.
The correct option is A.

• A) through unfair means

22. Not knowing what else to do, the workers decided to play it by ear. This means that they decided to act according to circumstances.
"To play it by ear" means to deal with a situation as it develops, rather than according to a fixed plan.
The correct option is B.

• B) act according to circumstances

23. The officers' mess was declared out of bounds for noncommissioned officers. This means that noncommissioned officers were restricted from the officers' mess.
"Out of bounds" means forbidden to enter or use.
The correct option is A.

• A) restricted from the officers' mess

24. At the debate competition, the visiting team was asked to start the ball rolling. This means that they were asked to begin the discussion.
"To start the ball rolling" is an idiom meaning to begin an activity or process.
The correct option is C.

• C) begin the discussion

25. The new principal runs a tight ship. This means that the new principal is firm.
"To run a tight ship" means to manage an organization or system in a very disciplined and efficient way, implying firmness and strict control.
The correct option is C.

• C) firm

26. When Sabila threw the chair into the crowd, there was pandemonium. This means that there arose a scene of great noise and confusion.
"Pandemonium" means wild and noisy disorder or confusion; an uproar.
The correct option is C.

• C) there arose a scene of great noise and confusion