______ one problem ______ another one. A. Hardly I had solved / when did I encounter B. Hardly I had solved / when I encountered C. Hardly had I solved / when did I encounter D. Hardly ha48/100______ one problem ______ another one. Hardly I had solved / when did I encounter Hardly I had solved / when I encountered Hardly had I solved / when did I encounter Hardly had I solved / when I encounteredGiải thíchChọn đáp án D