少年安能长少年,海波尚变为桑田。”唐代诗人李贺的这一诗句体现了( )
You can’t imagine _______ when they received those nice Christmas presents.
It is difficult for us to _________ a conversation with so much noise around us.
____ of the land in my hometown ____ covered with trees and grass.
I failed again in the examination and only then _____ how much time I had wasted.
She knows so much about England. She ________ there before.