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থিম নির্বাচন

আপনার পছন্দের থিম বেছে নিন।

Choose the correct sentence.

A. What are you doing for the last three hours?
B. What have you been doing for the last three hours?
C. What did you doing for the last three hours?
D. What had you done for the last three hours?
সঠিক উত্তরঃ D. What had you done for the last three hours?
Explanation: