你 or 您？ Which should I use when talking to my mother-in-law, 你 or 您？ I have known her a few years but we are not close (because we don't have many conversations). She is from North China if that makes a difference. Thanks

你好. 这些句子正确吗？ Are these sentences okay? 1. 我做管理工作在大学 2. 我学习中文有两个原因。 首先，我对中国的历史和文化感兴趣。 其次，我想和我妻子的家人说中文。 3. 我已经会说一点中文 4. 我学习中文已经一年了。 5. 我每周六天学习30分钟中文。 6. 回头见 Thanks! 谢谢！