English

The word 'dwarf' means something very small, so its antonym is 'giant,' which means something very large. Options B, C, and D are either synonyms or related words but do not directly serve as antonyms to 'dwarf.'

The phrase "keep at bay" means to keep something or someone at a distance or prevent them from approaching or causing harm, which matches option B.

The phrase "apple of discord" originates from Greek mythology, referring to an object that causes strife or conflict. Therefore, it means anything causing trouble, discord, or jealousy, which matches option A.

The correct spelling of the word meaning to disturb or bother persistently is 'Harass'. The other options are misspelled variants.

The idiom "an arm and a leg" means something is very expensive or costly, implying it costs a large amount of money. This matches option C exactly.

The phrase 'to put one’s hand to the plough' means to begin a task with determination and commitment, often implying undertaking a difficult or challenging task. Therefore, option B is correct.

The phrase "a man of straw" refers to someone who lacks substance or strength, often used to describe a weak or insubstantial person. Therefore, option A, "A man of no substance," is the correct meaning.

The correct preposition to use with 'jealous' when indicating the object of jealousy is 'of'. Therefore, 'She is jealous of my friend.' is correct.

The term 'extravagant' correctly describes a person who wastes money on luxury, as it means spending excessively or wastefully. 'Luxuriant' and 'luxurious' describe things rich in growth or luxury but not a person who wastes money. 'Stingy' means unwilling to spend money, which is the opposite.

The phrase "keeps on" is followed by the gerund form of the verb, so "watching" is correct. "She always keeps on watching dramas" is grammatically correct and natural.