Hello Dianne!

Hi, [이름]!

Thank you for writing this, I understood it better.

I apologize that I misunderstood or didn\'t get your question yesterday.

Anyway, I think this made everything clear.

Have a nice day as well!

_Teacher Dianne

These machines are used in various part of industrial market. 

>> These machines are used in various parts of the industrial market. 
 These machines have been using in various part of industrial market. 

>> These machines have been used in various parts of the industrial market. 

 My answer was \'Which one is proper?\'

>> correct

>> or: My question was, \"Which one is proper?\"
 Now I understood it.

>> correct

 My company has four teams. These are a sales team, a production team, a management team and a technical team.

>>  My company has four teams. These are the sales team, production team, management team, and technical team.
 My company has four teams. There are a sales team, a production team, a management team and a technical team.

>>  My company has four teams. These are the sales team, production team, management team, and technical team. (I didn\'t see any difference here.)

 Which expression is appropriate?

>> correct

 I began my business having a computer and a desk and a chair.

>> I began my business, having a computer and a desk and a chair. (Correct, but put a comma after the word business.)

>> OR: I started my business with a computer, a desk, and a chair.

 Is this sentense right?

>> correct

 I am sorry that I couldn\'t answer correctly in the last class.

>> correct (It\'s fine, don\'t worry.)
 Have a nice day!

>> correct