改错What we should do now is not to increase production,but improving the quality of our product
问题描述：
改错What we should do now is not to increase production,but improving the quality of our product
but后面的improving应该改为improve还是to improve,还是两者均可,
答
应该是but to improve
not..but..连接两个并列的结构,两个结构应该是相同的.前面是不定式,后面也应该是不定式.