A first grade teacher collected well-known proverbs.
She gave each kid in the class the first half of the proverb, and asked them to fill in the rest.
Here's what the kids came up with:

Better to be safe than... punch a 5th grader.

Strike while the... bug is close.

It's always darkest before... daylight savings time.

Never underestimate the power of... termites.

You can lead a horse to water but... how ?

Don't bite the hand that... looks dirty.

No news is... impossible.

A miss is as good as a... Mr.

You can't teach an old dog... math.

If you lie down with dogs, you... will stink in the morning.

Love all, trust... me.

The pen is mightier than... the pigs.

An idle mind is... the best way to relax.

Where there is smoke, there's... pollution.

Happy is the bride who... gets all the presents.

A penny saved is... not much.

Two is company, three's... The Musketeers.

None are so blind as... Helen Keller.

Children should be seen and not... spanked or grounded.

If at first you don't succeed... get new batteries.

You get out of something what you... see pictured on the box.

When the blind lead the blind... get out of the way.

There is no fool like... Aunt Edie.

Laugh and the whole world laughs with you. Cry and... you have to blow your nose.