What is the difference between "as quick as" and "as quickly as"? In the context of the article, "as quick as" is used, but I feel it might not be accurate. Shouldn't it be written as "as quickly as" here?

opera, play, drama, when they mean the same thing, what is the difference? Thank you so much！

I would like to know since I know biscuit is British English for cookie, and cookie is American English for the same thing, what does it mean when it's labeled "biscuit cookie"?

‎‎My child is preparing for a piano grade examination and needs to record a self-introduction in English. Please help me check if there are any errors in this self-introduction. I hope to correct basic grammatical errors without making too many changes. Thank you very much!

What is the difference between dip and sauce?

How should 'Entry' be understood here? Why not simply say 'a diary'? Why is it necessary to add 'a diary entry'?

How do you say "class headteacher" in English, and how is this term expressed differently in British English and American English? (I see that there are different terms used online. How is it referred to in British English and American English? Is it called a homeroom teacher in American English?) Someone told me that I should use the term "headteacher", is this correct?

yummy < tasty < delicious, is this the correct ranking according to the intensity of the expressions?

I saw a grammar rule in an English book that said: 'When we use the present perfect to talk about experiences and we want to say: 'at no time in (my) life' we use the word 'never'; 'at any time in (your) life' we use the word 'ever'.' What does this mean? Does it mean that it is incorrect to say'I have ever eaten snake.' ? However, I saw a description in the second picture of the exercise book accompanying the textbook, which indicates that the present perfect tense can actually be used with 'ever' for any subject, right? I've gotten really confused.