Have you used "the book of answers"

This book is not for reading but using, it's very funny.

How do you think of it?

how to understand this sentence?

I was the youngest son, and the youngest but two.

 

 

Does it mean that I have two younger sisters?

how to understand "but two" in this sentence?

Does "guy" only refer to a man, male person?

How to understand this sentence polymers are all substances which are made up of at least two monomer units. May I read it as "all the polymers are made up of at least two monomer units", if not, what is the difference between these two sentences

which one is correct: be overcome or be overcomed Which one

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What is your feeling if the doctor says you don't need to take any medication but What is your feeling if the doctor says you don't need to take any medication but you actually feel really ill. Maybe some people think that they should see another doctor and they can only be relieved after taking medication for their illness.

what is the differece between "neighboring " and "neighbor" when they are used as Adj.?

how to use the word "couple" may I say a couple? or two couples, a pair of couples? which one is correct