people do not take as __ exercise as they did in the past.为什么不填more要填much?

people do not take as __ exercise as they did in the past.为什么不填more要填much?
people do not take as __ exercise as they did in the past.
为什么不填more要填much?

people do not take as __ exercise as they did in the past.为什么不填more要填much?
asmuchas是固定句型,much可以换成其它形容词表示A和B一样怎么怎么样

as……as是同级比较