The last one is classic!
A grade one teacher collected well known proverbs. She gave each child in her class the first half of a proverb and asked them to come up with the remainder of the proverb.
It's hard to believe these were actually done by grader one kids ("6 " year-olds),
Don't bite the hand that --- looks dirty.
If you lie down with dogs, you'll --- stink in the morning.
No news is --- impossible.
You can't teach an old dog new --- maths.
Love all, trust --- me.
The pen is mightier than the --- pigs.
Where there's smoke there's --- pollution.
A penny saved is --- not much.
Two's company, three's --- the Musketeers.
Laugh and the whole world laughs with you, cry and --- you have to blow your nose.
There are none so blind as --- Stevie Wonder.
When the blind leadeth the blind --- get out of the way.
And the favourite: Better late than --- pregnant!