—What do you think our descendants(后代) be like in thousands of years?—Who knows exactly what happen to human beings?
He narrowly escaped _______ by the falling tree.
_____ is known to us all, a skill can only be acquired through hard work.
There is no doubt _____ short sight is a serious problem among the youth of our country.
From the deep valley ______, which had my heart in my mouth.
______, I always feel I want a few more days.