What he wanted to suggest is to cut down the price and increase the sales.
问题描述：
What he wanted to suggest is to cut down the price and increase the sales.
what 可以改为 that
答
不可以,因为what在句中充当了sth.的成分,he wanted to suggest sth.,但是that引导主语从句在句中不充当任何成分.所以如果用that he wanted to suggest 就没有意义了