Contact me is more formal. Get in touch is casual that's only good if you are talking with friends. However, contact us is better if you are working for a company or if you are in a team.
Example about test A1 German
Quelle est la solution magic pour que je puisse communiquer en français??
How to use "bit"?
what is the difference of yet and already in making a question or when we put it at the end of the sentence?
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