'Think of' or 'think about'

[Jolittn]

Hi,

Which preposition should I use with 'Think'. For example, when asking an other person's opinion about something, should I say 'What do you think about...' or 'What do you think of...' ?

For example,
1. What do you think about/of dogs?
2. What do you think about/of cycling?

Thank you for your help!

[ratóncolorao]

You can use both

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