Why don't you take example by your teacher?
Look at Miss Hyams." We all looked at Miss Hyams, but she was looking for some papers in her desk.

'Look how Miss Hyams works!' said the Head Mistress.

'_She_ never grumbles, _she_ never asks for a holiday!' We all looked again at Miss Hyams, but she hadn't yet found the papers.

There was an awful silence; you could have heard a pin drop.

There wasn't a single cough or rustle of a dress.