Rid Us Of These Tricky Riddles

#1

It takes one word to separate them, otherwise
they are inseparable. What are they ?

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#2

What is black when you buy it, red when you use it,
and grey when you throw it away ?

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#3

Many have heard me, but nobody has seen me,
and I will not speak back until spoken to. What am I ?

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#4

I’m as flexible as can be, and come in many uses,
but be warned; I may hurt you with a whop,
and you’ll start to hop.What am I ?

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