He will _____ our class to sing at the school singing contest.
—Hello, this is Tom speaking. —Tom? Oh, sorry, I ______ your voice.
___________ 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.