Elated means extremely happy or joyful. Among the options, “Overjoyed” is the closest in meaning.

The verb “married” is followed by the preposition “to.” So, “married to a doctor” is correct usage.

Reluctant means hesitant or unwilling to do something, so “Unwilling” is the correct synonym.

Scarce means not enough or insufficient, so the opposite is “Abundant,” meaning plentiful or in large supply.

She is singular and takes “doesn’t,” not “don’t.” Correct form: “She doesn’t like mangoes.”

Zoo is a place where wild animals are kept for public display or conservation.

Bite the bullet means to endure something painful or unpleasant bravely.

Simple past passive form of “build” is “was built.” So the correct sentence is: “The house was built in 1990.”

Environment is the correct spelling referring to natural surroundings or conditions.

Correct structure: “He doesn’t know.” Use “doesn’t” with base form of the verb.

Used to in this case should be followed by a gerund. Correct form: “used to working.”

Rigid means stiff or inflexible. Its opposite is “Flexible.”

Children is plural, so use “have.” Correct: “The children have gone to school.”

Hit the sack is an informal phrase meaning to go to bed or sleep.

An “Optimist” is someone who always sees the positive or hopeful side.

Senior takes the preposition “to,” not “than.” Correct: “He is senior to me.”

Umbrella starts with a vowel sound. So “an” is the correct article.

Neither should be followed by “nor,” not “or.” Correct: “Neither Ramesh nor Suresh came.”

Diligent means hardworking or putting a lot of effort into something.

Correct punctuation: “My friend’s books” (possessive singular noun).

Victory means winning; its opposite is “Defeat.”

Use “any other” to compare one among a group excluding the subject herself.

Because is a subordinating conjunction connecting cause-effect clauses.

Present perfect continuous is correct for “since morning”: “has been raining.”

Ascend means to go up, so its antonym is “Fall.”

The correct preposition with “afraid” is “of” — “afraid of dogs.”

The idiom means something is extremely expensive.

A “Poet” is a person who writes poems.

Each is singular, so the verb should be “is.” Correct: “Each of the students is present.”

Adverse means harmful or unfavorable, so “Harmful” is the correct synonym.