What is the correct tense in this sentence? "Mansur has been using this pen for the last five years"

এই টপিকের আরও কিছু প্রশ্ন:

• He would _________arrested if he had tried unfairmeans এখানে শূন্যস্থানে কি বসবে?
• Which of the following is correct?
• The word 'right' has been used as a verb which of the following sentence?
• If the roof ------ we all ----die.
• ______ I would have called her.