What's the difference among quickly,fast,rapidly and soon？
What's the difference among quickly,fast,rapidly and soon？

Question

Answer

take action quickly !
his speed is so fast 
the economy of china develops rapidly
i will soon be back

Answer

Quickly, fast and rapidly all have the same meaning : the opposite of 'slowly'

Soon has a completely different meaning. Soon means 'in a short time from now'.

Answer

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