A good student is good at _______ what the teacher says at once when hearing something important in class .
When _____ help, one often says “Thank you.” or “it’s kind of you”
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.