Fill in the Blanks

 "Buy" is the correct choice.

When a road is closed, drivers take a diversion - an alternative route to reach their destination. Deviation means departing from standard, digression is a temporary aside, and divergence means separating in different directions.

Confirmation is the correct word because when you hear news from a friend and wait for official notice, you are waiting for it to be confirmed. Ratification refers to formal approval of documents or treaties. Sanction means giving permission or approval. Recommendation means suggesting something rather than verifying it.

Set him up a business is correct. The phrasal verb 'set up' means to establish or arrange something. His father-in-law established a business for him. Made up would mean invented or created something fictitious. Put up and built up don't work in this context.

Here the issue is of 'eating'....Appetisers are food which create hunger. So, for cake this adjective cannot be used. Neither can dainty or delicate be used as they are generally used with persons or things. We use delicious to describe a cake. So, option 3 is correct.

We could paraphrase the sentence to "...does not concern previous knowledge". The sentence is implying that anyone without previous knowledge would do well on the test except graduates of the subject. Here concerns refers to the subject matter of the test and hence is the correct option.

Talking is correct because 'talk about' is the correct prepositional verb. Saying cannot be followed by 'about' - you say something directly. Telling would require an object (tell someone about something), not just 'telling about'. Discussing is transitive and doesn't take 'about' - you discuss something, not discuss about something.

Flaw is correct because in literary criticism, 'tragic flaw' is the standard term for a hero's fatal weakness or character defect that leads to their downfall. Fault and defect are too mechanical or generic. Weakness is too broad and doesn't capture the specific literary terminology.

Spell is correct. 'A spell of weather' (specifically warm/cold/dry weather) is an idiomatic expression referring to a continuous period of particular weather conditions. Span and length refer to measurement but aren't used with weather. Time is too generic and doesn't form the correct collocation.

Respectable is correct because it means 'deserving of respect' or 'socially acceptable' - which fits the context of living a life worthy of respect. Respectful means showing respect to others. Respected is the past participle (others respect you). Respective means 'belonging to each' and doesn't fit here.

Clandestine is correct because it means 'kept secret or done covertly' - which perfectly describes a secret affair between lovers. Cannot is grammatically incorrect. Covert also means secret but is less commonly used for romantic relationships. Unknown as an adjective doesn't fit - you would say 'little-known affair' not 'unknown affair'.

Consideration is correct. 'Shows consideration for' means demonstrates regard for others' feelings - this is exactly what a well-bred, honorable person does. Concern could work but consideration is more precise for thoughtful regard. Decaying is meaningless in context. 'None of these' is incorrect because consideration fits perfectly.

Eccentric is correct because it means 'unconventional or slightly strange' - which matches someone being fond of weird pets. Emotional doesn't fit the context. Amiable means friendly and sociable. Ambition is a noun, not an adjective, and doesn't describe character.