Explanation

"A good dentist" is used for the first general mention (indefinite article).

"The dentist" refers to the same specific person already introduced (definite article).

Explanation

The protagonist is the main character or hero in a story, often facing challenges or conflicts.

This character typically drives the plot forward and gains the audience’s sympathy.

Explanation

The correct sentence is: "If you get back late, I will be angry."

This follows the first conditional structure, where the present tense is used in the if-clause and "will" is used in the main clause to express a possible future outcome.

Explanation

She asked him why he was late.

In indirect speech, the question is converted into a statement, and the tense is adjusted.

"Are" changes to "was" to match the past tense.

Explanation

The alarm is a singular, non-living thing, so the correct pronoun is "it."

Correct sentence: When the alarm rang, I turned it off.

Explanation

"Therefore" shows a cause-and-effect relationship between being tired and taking a nap.

It logically connects the reason (tiredness) with the result (taking a nap).

Explanation

Prizes were given away to the prize winners by the Chairman.

In the passive voice, the object of the active sentence becomes the subject, and the focus is on the action.

Explanation

The correct preposition is "to" as it is commonly used when referring to someone in the context of losing to an opponent.

"He lost the match to his rival" indicates the opponent's victory over him.

Explanation

In passive voice, the object (the piano) becomes the subject, and the verb form changes accordingly.

"Who" changes to "By whom," and the correct structure is "By whom was the piano stolen?"

Explanation

Personification gives human qualities to non-human things.

In the given line, "music singing" attributes a human action (singing) to music, making it personification.