It seems you are looking for the (or possibly the Teacher’s Book or extra resources) for the Matura Leader Plus B2 coursebook or workbook, specifically in PDF format .
A: No. There are usually two keys. One for the Student's Book (SB) – which contains reading and listening tasks – and one for the Workbook (WB) – which focuses on grammar and vocabulary. Most students need the Workbook Key . Matura Leader Plus B2 Key Pdf