If I'm trying to write: 今朝自転車で仕事へ行きました。

Should I write it as above, or should it be 今朝は、自転車で仕事へ行きました。

Is there a general guide for this? Should I prefer it one way or the other
when speaking versus when writing?
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2023-05-10T15:18:15.810
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2023-05-10T15:18:15.810
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question
grammar particles
To Particle or Not to Particle: 今朝は or 今朝