English

The term 'Omniscient' means having complete or unlimited knowledge, awareness, or understanding; knowing everything. The other options do not mean 'one who knows everything.'

A fortnight is a period of 14 days or two weeks. This is the standard and widely accepted definition of the term.

The verb 'snap' is commonly used to describe the sudden breaking of wires, often accompanied by a sharp sound like a 'twang'. 'Break' is more general and less specific to wires making a twanging sound, while 'tear' is not typically used for wires. 'None of these' is incorrect as 'snap' fits best.

The word 'array' means an ordered arrangement or display. Its antonym would be 'disarrange,' which means to disturb the order or arrangement. The other options do not relate to the meaning of 'array.'

The sentence requires an adjective describing Maria as a student. "Intelligent" is the most appropriate choice to explain why she does well in her studies, as it directly relates to mental ability. "Clever" is close but less formal and less precise in this context. "Attractive" and "charming" do not relate to academic performance.

The subject 'Teachers as well as headmaster' is treated as plural, so the plural verb 'are' is correct. 'Is' and 'was' are singular verbs, and 'have' is not appropriate here.

The phrase 'in order to' correctly expresses purpose, and 'before' correctly indicates the time prior to the supermarket closing. 'So that' is also possible but less natural here, and 'before' fits better than 'at' or 'by' in this context.

The word 'morbid' means relating to gloomy or dark subjects, often associated with death or gloominess. 'Cimmerian' means very dark or gloomy, making it a synonym of 'morbid'. The other options do not match the meaning.

The phrase 'Each of us' is grammatically singular because 'each' is a singular pronoun. Therefore, it takes a singular verb form. The correct verb to use is 'has' (B), not 'have' (A). Although 'us' is plural, the subject is 'each,' which is singular, so the verb agrees with 'each.' The phrase 'Each of us has eaten our meal' is correct and commonly accepted. The use of 'have' would be grammatically incorrect in formal English in this context.

The word 'paucity' means scarcity or lack of something. Therefore, 'scarcity' is the correct synonym among the options provided.