Pictures:

What begins and ends with E but has only one letter?

Envelope.

950

What do you call shoes made of banana peels?

A pair of slippers.

970

How do trash collectors learn their trade?

They pick things up as they go along.

973

What invention lets you look through a wall?

A window.

960

Why couldn't the leopard play hide and seek?

Because he was always spotted.

990