Here, we use a reflexive pronoun for emphasis. A native speaker would always use a reflexive pronoun when using "in spite of".

"Social" - between friends "Societal" - across a nation/society

You become an adult. You become adult enough to do (something).

The phrase is not used in everyday conversation. You might read it in a newspaper. The phrase is used to talk about opinion in politics or culture. "Is (the thing) a boon or bane to society?" = "Is (the thing) good or bad for society?"

Roughly, "I quite like it" means "I like it". How much (the "grade") depends on the tone of the conversation and the personality of the speaker. One native speaker can misunderstand another native speaker. Usually: I quite like (a thing) = (The thing) is alright. I quite like (a person) = I like (the person) a lot. "I quite like (a person)" can mean "I like the person romantically". I am a British English speaker.

Leigh is right. "Bilateral" is used in academic, business or political writing.

1. accessible 2. It is okay without "if", but you need "which" or "that": In the event that you need extra help, feel free to contact me directly. It is okay to say "in the event you need extra help" when speaking, but you need "which or "that" when writing. (I am a British English speaker. A US English speaker may answer differently.) 3. When you "accrue" something, you receive more of it over a long period of time. The word is used to talk about business or money. "Sick leave credits" describes time you can take off if you are unwell. We do not have this in the UK, so I cannot tell you a lot. Sorry! "per quarter" means "per quarter of a year". In other words, every 3 months. "Workers with a contract at Wendy's Incorporated receive sick leave credits. Workers receive one extra sick leave credit per quarter." 4. Yes. It is formal, and is often used in academic writing. 5/6. "Have". This verb tense is called the "present perfect continuous". It is a present tense because the children are disappointed now with how they acted in the past. The ""present perfect continuous" tense is formed like this: [has/have + been + present participle] ~~~~~~~~~~~ Is my answer clear? Would you like it explained a different way?

''I have an overwhelming desire to..." is how a native speaker would say it. The phrase is used in literature to show passion or love for something. "He has an overwhelming desire to kiss her." "She was an overwhelming desire to become pregnant." When speaking about something like pizza, the speaker is using irony.