8.Do you believe the reason（） he gave for being absent?A.when B.why C.which D.for which 9.Can you imagine yourself （）alone in a stadium which can （） more than ten thousand people?A.stand；sit B.standing；sit C.stand；seat D.standing；seat 10.——Got your driving license?——No.I （） too busy to have enough practice,so I didn't take the driving test last week.A.was B.have been C.am D.had been