Yes, the collective nouns for a group of actors are:
Yes assuming you are about to say a company that does something.
Working for a company is the fair and the correct answer for this question.
Yes, it is correct to say "he works in a newspaper" to indicate that someone is employed by a newspaper company.
It is not correct to say it exactly that way, but it would be correct to say, "We warmly welcome you to our company." In this case, "warmly" is an adverb modifying "welcome" used as a verb. It would also be correct to say, "We would like to extend a warm welcome to our company." In this case, "warm" is an adjective modifying "welcome" used as a noun.
Dead on, yes.
I would tend to say is working in an office.
Better to say "The company is in the red." or "The company had a net loss for the year." "Made a loss" sounds a little like something you would do in the bathroom!
"went out in the company of your friends" is correct.
The correct term to use would be within.ÊFor example, I noted that within your company there seems to be a struggle with employee direction that we should address.
It is correct to say that American Express company and Mark Foundation cordially invite you to attend the annual luncheon.
"An environmentally responsible company" is more correct.
No. A company is not a person. In fact the whole concept of a company is to protect persons who have invested in a business behind a legal barrier for financial and legal protection. So it should be "he company which is doing something"