Choose the correct answer

Like any other universities, the Open University can give you a degree. However, you don’t have to (1) _______ working to study. It can also open up a whole variety (2) __________ interest. If you have (3) _______ studied before, you will enjoy the special, new pleasure of (4) _____ your knowledge. You will make friends of (5) _____ kinds. 

(1) _________

• A. 
  stop
• B. 
  end
• C. 
  break
• D. 
  leave