One way to understand thousands of new words is to gain _____ good knowledge of basic word formation.
___________ get a better score, she has been studying hard all day.
It is the first time that I ______________ such a beautiful scene.
Do you know that I have trouble __________ the work?
Mr. White ______ from heart trouble, and he takes some medicine with him.
______ the bikes are too old to ride. I’ll have got to get them ______.