From --.com: Every person during his student life experienced difficulties and unexpected problems in completing various kinds of assignment,

from .co.uk: We are this much sure of the expertise and proficiency of our writers
These are just my two favorites. There are, of course, countless more.
If you are a native English speaker and can't tell that you shouldn't order from these companies based on their webcopy, you shouldn't be in college to begin with.
My recent chat with .co.uk (note: when two or more of my comments come up in a row, fred took over a minute to respond):
Please wait for a site operator to respond.
You are now chatting with 'Fred Adams'
Fred Adams: How may I help you today?
you: What country are you located in?
Fred Adams: we are in UK
you: I thought UK companies had to list their address on their homepage
you: Fred?
you: Anyone there?
Fred Adams: Yes, I am with you
you: Do you have a response?
Fred Adams: we are in Central London
you: Where in Central London?
Fred Adams: and as far as the address is concerned we are not allowed to provide that on the web site because of the nature of our services that we offer
you: Is it illegal
you: ?
you: is what you do illegal in some way?
you: why can't you provide your address?
Fred Adams: No
Fred Adams: It is not
you: then why can't you provide your address?
Fred Adams: because of the nature of the services that we provide are confidential so we have to keep our address save and secured
Fred Adams: so that there won't be any harm to our writers and employee
Fred Adams: by the way may I know what are you looking for?
you: I am looking for a reputable company, and you are lying to me. UK companies are required to list there address by law. Your English and the English on your website is also very bad, and i think you are operating from a foreign country to rip people off.
you: Your name also sounds fake, like you're trying to hard to sound American (it's not even a very british name)
you: Are you still there, "Fred"?
you: Hello?