I need a little advice. Please help... (Part 1)

I'm sorry to bother you.

About year ago I acquainted with girl from Japan on Facebook. At the start we were writing to each other. After this we had talked on skype. Then she offered me to check my english's level and gave me link site where you can do it.
http://www.examenglish.com/leveltest/index.php
I've forgot about this site and I don't had much time. At last I've rememberd it. I had passed an exam on sunday.
It seemed that I have B1 level it means intermediate. It's not good but not a death.
I asked myself why I have this level and I tryed to make test for level B2
It was a disaster. Most answers were wrong. I didn't know right answers or all of them seemed to me right.
http://www.examenglish.com/FCE/fce_grammar.htm
2 weeks a ago I started to read Book which was founded on Ilya Frank's method.
I would like to give an example:
"My cabby drove fast. I don't think I ever drove faster, but the others were there before us. The cab and the landau with their steaming horses were in front of the door when I arrived. I paid the man and hurried into the church.
There was not a soul there save the two whom I had followed and a surplice clergyman, who seemed to be expostulating with them. They were all three standing in a knot in front of the altar. I lounged up the side aisle like any other idler who has dropped into a church. Suddenly, to my surprise, the three at the altar faced round to me, and Godfrey Norton came running as hard as he could towards me.
"Thank God," he cried. "You'll do. Come! Come!"
"What then?" I asked.