Grade-4 Class-8

The correct article is “the” because “first” denotes a specific ordinal position. The standard construction is “the first to conquer Mt. Everest”; Edmund Hillary and Tenzing Norgay reached the summit on 29 May 1953.

Use “an” before “unknown” because the word begins with a vowel sound: an unknown heir. Article choice depends on pronunciation, not simply the written first letter.

The correct preposition is “for”: the fixed expression is “have pity for someone”. “For” identifies the person who is the object of sympathy.

The standard collocation is “take precautions against” something harmful or undesirable. Therefore, “Take precaution against cold” is the intended construction.

The natural expression is “under the tree”, meaning directly below or sheltered by the tree. “Underneath,” “beneath” and “below” can be grammatical in other contexts, but “under” is the standard simple preposition expected here.

Veterinary is the correctly spelt word, relating to the medical care of animals. The noun is veterinarian and the adjective is “veterinary.”

Elementary is correctly spelt. It can refer to something basic or introductory, as in “elementary education.”

Dissimilar is correctly spelt and means “not alike” or “different.” The word contains the double s after “Di-” and another double consonant pattern is not inserted in “-similar.”

Good → better → best is the correct irregular comparison pattern. Therefore “Good, Best” is the only valid pair among the options representing the positive and superlative forms.

Calm → calmer is a standard comparative formation by adding -er. “Funnest” is nonstandard in this context, “more tall” is incorrect, and “worser” is a nonstandard double comparative.

Sad – Happy are opposites: sad expresses unhappiness, while happy expresses pleasure or contentment. The other pairs are synonyms or near-synonyms.

Within – outside are opposite in meaning. “Within” means inside or inside a boundary, while “outside” means beyond that boundary.

Cheat – deceive are synonyms in the relevant sense: both can mean to trick or act dishonestly toward someone. The other pairs are opposites.

A group of dogs is called a pack. “Swarm” is commonly used for insects, “herd” for certain hoofed animals, and “flock” for birds or sheep.

A group of monkeys is commonly called a troop. The collective noun is especially common in zoological and general-English usage for groups of primates.