Cambridge PET and FCE test books First Year

Here are just 2 examples of books available for students who want to to do extra work on PET (B1 level) or FCE (B2 level) in parallel with the course:

https://www.amazon.com/Cambridge-Preliminary-English-Students-Answers/dp/052175528X/ref=sr_1_3?s=books&ie=UTF8&qid=1539320388&sr=1-3&keywords=Cambridge+PET+test+books+with+answers

https://www.amazon.com/Cambridge-English-Revised-Students-Answers/dp/1107695910/ref=sr_1_1?s=books&ie=UTF8&qid=1539320420&sr=1-1&keywords=Cambridge+FCE+test+books+with+answers

There are also test books at an advanced level for those who have already passed FCE. You should look at C1 Advanced or IELTS test books (C1 level).