LPI and English courses

I finally finished that English test, Language Proficiency Index (LPI) today!
I've been taking this test to get good results for the English courses that I want to take.
The course I wanted to take is called English 115, but I've been assigned to take Linguistics 099. Linguistics 099 is two levels below than the English 115, and it doesn't have a credit.
Let me put these courses in order; from the lowest, there are Linguistics 099, English 099, and English 115. Both LING 099 and ENGL 099 doesn't have a credit. So I really wanted to improve my English and take 115 or at least ENGL 099.
But since the university doesn't wait so long for my slow improvement, I decided to take any course which will be assigned from the result of this test in September. I thought I wrote well for the essay part compared to the last time, but then I thought I may not do well in the sentence structure and the English usage parts' 20 problems. I had to find an error for each sentences, but I didn't see the errors clearly especially in the English usage part. English usage is one of my biggest weak points.
But anyway, the test was done, and I know that I don't fall from LING 099. So I no longer worry about this test result!