Question

You are supposed to ask your teacher for help.

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Answer

你应该向你的老师求助。/你应该找老师帮忙。

【解析】

考查英译汉。You你；be supposed to do sth.应该做某事；ask sb. for help向某人求助/找某人帮忙；your teacher你的老师。最后根据汉语习惯翻译整个句子。故答案为：你应该向你的老师求助。/你应该找老师帮忙。