Explain the words in bold.

I *strained* my back picking up a box and *bruised* my arm when I banged it into a door!

A big *spot*'s just come up on my chin, just to the left of my *scar*.

I *injured* my knee playing tennis and now it *aches* all the time.

Mandy *fainted* and was *unconscious* for about a minute.

I've got an *itch* on my back but I can't reach to *scratch* it.

*Take a deep breath*, then *hold your breath* for three seconds.