Russian: 100%
English: 92%

my errors:
(I do not show correct answers so that other people would not lose their interest to take the test)

OK, I will not even show my wrong answers to everyone. I made them white. Just select the text below to make it visible.

Mr. Hawkins requests that someone _________ the data by fax immediately.
You gave an incorrect answer. You answered: B. sends

The company will upgrade _________ computer information systems next month.
You gave an incorrect answer. You answered: B. their

Many cultures have special ceremonies to celebrate a person's _________ of passage into adulthood.
You gave an incorrect answer. You answered: A. right

And I have a question to English speakers on my second error:
Why is it not possible to say "The company will upgrade their computer information systems next month"? I learned that "collective" nouns like "family, company, police" etc. are used as plural nouns: All the family are at the table. The police are investigating the case. Am I wrong?