1虽然我英語学六年了,但现在还用不了。
2. Not only young people, but also elderly people use Wechat, so we can say WeChat is the most influential SNS company in China. (应该用“不光....,也”的语法。)
不光是年轻人,老年人也用微信,所以我们可以说微信是在中国有最大影响力的社交网络。
3. If only you find problems, you can definitely find their resolutions.
3.只要会发现问题,就一定找到解决办法。
4. Apart from working as a cram school teacher, he also works at a cafe.(应该用“除了...,还”的语法。)
除了当补习学校的老师,他还在咖啡屋打工。
5. Most of the people living there are working on IT. (应该用“几乎都”的语法。)
住在那儿的人几乎都涉及IT。
*Since my English isn't perfect at all, so maybe there are many English grammatical errors as well, but hope some native Chinese speakers correct me, thank you.

