First Test

I was tested. It's conversation test. I was pass, however,the result is not good. My pronunciation and comprehension & fluency and grammar are fair all over.

I understand that my pronunciation and fluency are fair. But I don't understand that grammar is fair. It was checked Singular/Plural error in the result table. I don't know where I mistaked.

Anyway I'll have to make an effort to get a good grade. There is test tomorrow, too. It is pronunciation P/F division ability test.