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Zorg the alien is writing a report to his commander about his attempts to play human sports. Select ALL the grammatically correct sentences he can include.
The correct answers are I am terrible at playing Earth basketball. and I am completely hopeless at playing Earth basketball.
When we talk about how well (or how poorly) we do an activity, we use adjectives of ability (like good, bad, terrible, excellent, or hopeless) followed by the preposition at.
We do not say "good in" or "bad on" when referring to skills and abilities.