请帮我看一下一句英语句子的语法

题目

请帮我看一下一句英语句子的语法
Their work was well planned. Everybody worked with great enthusiasm, and thus they overfulfilled their quota.请问这句话的语法和表达对吗?and thus那里正确吗、
Their work was well planned,everybody worked with great enthusiasm, and thus they overfulfilled their quota.上面的那句发错了，看补充问题的这一句

答案

and thus 那里没错,但是第二个逗号那边有点问题
逗号不能连接两个句子,可以在逗号后面加个and或者把逗号改成句号