Hi Allen, let me see if I can provide some answers... 1) 在词典上 and 在词典里 are both correct, but they usually have different meanings. We use 在词典上 when an object is placed atop the dictionary and 在词典里 when we're referring to words in a dictionary or something stuck inside a dictionary. 2) There are multiple ways to say "fix the problem" depending on what the problem is. If it's a physical object that needs fixing, the verb is 修. If it's a non-physical problem, the verb for "to solve" is 解决. As for "northern street," it's usually 北街 or 北边的街. 3) 潮湿天气 does mean "sultry weather," so you are correct.\ I hope this helps.