The lecture was so complex that I simply couldn’t ______ at

I simply couldn't understand how it ______ that you did so m The box was so heavy that I couldn't lift it .中为什么用couldn't i was so excited that i couldn't sleep at all I was so ______ moved by his words that I couldn’t fall asle 请问I was so ______ moved by his words that I couldn’t fall as I simply couldn't understand how it ________ that you did so So excited was she at the news that she couldn't say a word. "I was so pressed for time that I couldn't give the lengthy 1.I was so moved by the film that I couldn’t stop crying ___ The word on the blackboard was so small that I couldn't it was so cold that i couldn't feel my ——that I couldn’t be absorbed in the work.A.It was so noisy