English

The word 'turmoil' means a state of great disturbance, confusion, or uncertainty. Among the options, 'Confusion' is the closest synonym, making option D correct.

The correct preposition to use with 'good' when referring to a skill or activity is 'at'. Therefore, 'I am good at tennis' is the correct phrase.

The verb 'decide' is typically followed by the preposition 'on' when referring to making a choice about something. For example, 'They decided on the grey sofa' means they made a decision regarding the sofa. The preposition 'about' is not commonly used directly after 'decided' in this context. Therefore, the correct preposition to complete the sentence 'They decided _____ the grey sofa?' is 'on'.

The correct answer is 'Was' because the sentence requires the past continuous tense to describe an action happening simultaneously with 'I was sleeping.' 'She was playing the sitar' correctly matches this tense and subject-verb agreement.

The term "YOB" is British slang for a young troublemaker or hooligan, which aligns most closely with "Aggressive" among the given options. The other options do not relate to the meaning of "YOB."

The word 'fervor' means intense and passionate feeling, which is closely synonymous with 'excitement'. The other options do not convey the same meaning.

The correct phrase is 'Despite the bad weather,' which means the outdoor party was rescheduled even though the weather was bad. 'Because of' indicates causation but does not fit well with the sentence structure here.

The antonym of 'selfish' is 'altruistic,' which means showing selfless concern for the well-being of others. The other options do not directly oppose 'selfish': 'helpful' is positive but not a direct antonym, 'egocentric' is similar in meaning to selfish, and 'acquisitive' relates to acquiring wealth or possessions.

The word 'mull' means to think about something deeply or carefully, making 'Think' the correct synonym among the options provided.

The correct preposition to use in this context is 'from' because the phrase 'differs from' is the standard English expression to indicate a difference between two things.