Turn down extra work without damaging the relationship — say no, and offer something. A spoken B1 scene with Helfen — your team leader's desk on a Thursday.
Your team leader's desk on a Thursday. Helfen is asking nicely, which is the hard part.
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Answer this one with Scholar or Master
Speaking is one of the hands-on skills, with spoken practice with a partner who talks back from Helfen — so it is marked properly rather than ticked.
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