When I visited him, he ___ for two hours.

• ক) was sleeping
• খ) slept
• গ) has been sleeping
• ঘ) had been sleeping

• had been sleeping

যিকোনো এটা বিকল্প বাছি লোৱাৰ পিছত উত্তৰটো চাব পাৰিব।