সঠিক উত্তরঃD.
I have been lying on the floor for three hours.
Explanation: the correct answer - - 'I (to lie) on the floor for three hours' - I have been lying on the floor for three hours.
কোন কাজ অতীতে শুরু হয়ে এখনো চলছে, এমন বুঝাতে present perfect continuous tense হয় (sub + has/have been + মূল verb + ing).
