It isn't "terrible" English, it is just awkward. "We often ski (go skiing) in winter, or "In winter, we often go skiing" sound better to my American ear. The translation is comprehensible and not worth getting upset about it. Presumably, the purpose of this exercise is to become familiar with the Russian use of verbs of motion and reflexive verbs
People don't actually complain about the suggested answer, but that their (better) answer wasn't accepted. If you use a Browser, you can set it to type everything yourself. If you just use the word choices, then it's obviously not a big Problem.
Change perspective once in a while, really...