A student with a 6.0 will still need a great deal of help to use English at university. A 6.0 can put sentences together and knows the structure for academic writing (and speaking) but will still have many problems with grammar. These students are usually in Upper Intermediate classes at language schools.
You are right when you say that the reading seems more difficult - It is! The reading and writing are the main problems for most students. Practice, practice...
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