These are the ones I use in my classroom quite regularly:
Diane? Diane??? You �re not listening! You �re having your head in the clouds again, aren �t you?
The weather is horrible today. It �s raining cats and dogs outside!
Don �t try to fool me, my dear kids... I �ve got eyes in the back of my head!!
Look at Sandra - she �s a busy bee today, isn �t she??
Come on, David, you �re as slow as a snail today! Get a grip, will you?
A little bird told me that you haven �t done your homework.
Don �t be so nosy... Remember that curiosity killed the cat!
Sit still, Julia, please! Have you got a bee in your bonnet??
Shhh, be quiet now and listen! Silence is golden, kids!!
Don �t listen to George - he �s just green with envy, that �s all...
This exercise is not as hard as it seems. I �m sure you can do it! It �s a piece of cake, honestly!
What exactly do you want to tell me, Lisa? Just let the cat out of the bag!
No, we �re not writing a test today, hehehe! I was only pulling your leg!!
Hope it helps...
Love - Silke