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Invisible means that you can't see it. So, anything that is invisible has no colour!
'Have you got any invisible ink?'
'Certainly, sir. What colour would you like?'
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Invisible means that you can't see it. So, anything that is invisible has no colour!
'Have you got any invisible ink?'
'Certainly, sir. What colour would you like?'
Do you like this joke?
English courses for children aged 6–17