This is one of the most important subjects in the 1st semester of the 1st year. This is not a hard subject but the thing is this is the subject which checks how good your English is. If your are good in English you don't even need to do a past paper before sitting for the final exam. I'm telling this because I only did 2008 past paper before the exam and finally I got an 'A' for this subject.
The importance of the subject is that it affects your GPA. Some of my friends had got all 'A' s except for this subject and finally ended up with getting half scholarships for that semester.