__ himself with greatstrength, he raised himself.

I was tired _____ listening to classic music. Let’s listen to the pop songs.

has an internal clock that regulates thebeating of our hearts, and the ______ of our breathing.

I know smoking is bad for my health， ____ I just can’t give it up.— It is easier said than done.

keep doing morning exerciseseveryday, you’ll benefit ______ it