Can "guys" refer to girls and women? I've seen people starting a speech with "hey guys" in front of a group of females. But as far as I can remember, there was once an Australian clarifying that guys can only be used to address men. Can anyone tell me what your opinion on this is? Thanks in advance.

Can you tell me what this sentence means ,please How different is our mean-spirited, picky insistence that every child get every last little scrap of “understanding” that can be dug out of a book. I can understand it, but it's why it's written this way that confuses me. (How different "is" ) Why is the linking verb put in the middle rather at the end of the sentence,if it's an exclamation,like "how beautiful you are " Thanks for your help:D

Could you tell me whether to use Introduction or Profile? Thanks! I want a word for "a description of somebody that you read on the web page" . Not until my English teacher circled the "profile" I used in my writing with his red pen did I start to doubt the use of these two words. I hope that you can help me distinguish them by offering some examples,thanks in advance :D

Why do we say "work FROM home " ? I've been wondering why 'from' instead of 'at' is used here. Can you explain this to me?! I 'd be grateful :)

Can you explain what "throw in" means here ,thank you in advance : ) The context basically is that working at home has quite a few advantages, such as saving time, having healthier snacks to eat and having your dog hugging (1)at your feet . "(2)Throw in a little Facebook,Twitter, etc. We are on all the time!" Q(1): Should there be a preposition 'at' and why? Q(2): What does 'throw in' mean in that sentence? Thanks for your help!

Can anyone tell me what the difference between east and eastern is? East Africa , Eastern Europe I've been wondering if these two words are interchangeable in some cases. Can you give me some examples of how they're used respectively? Thanks in advance:)

Spiritual/ religious , thanks! I'm an atheist who's been wondering what it's like to believe in God in any form. Can anyone tell me how it feels to be religious ? Does it bring you hope? And I also want to know what people mean when they claim that they're spiritual but not religious :) Thank you for sharing your thoughts with me !

Could anyone tell me which preposition to use in this sentence,please The stories of Long March, ( ) which this is an example, are well written. Can you please tell me what should be filled in the blank and whether this sentence sounds natural? It'll be even better if you can explain what it actually means! Thanks a lot ;P