Pictures:

What 5 letter word becomes shorter when you add 2 letters to it?

The word 'short'.

988

What do you call a train carrying bubble gum?

A chew-chew train.

959

Why couldn't the leopard play hide and seek?

Because he was always spotted.

990

Why didn't Bill use his photographic memory?

He never developed it.

961

If you threw a white stone into the Red Sea, what would it become?

Wet.

994