改错题,关于as much as 和 usage的用法疑问华中师范大学某一年基础英语真题,给一句话,四个划线的选项,选出含有错误的一项.One survey indicated each Chinese family averaged （as many as ）30 minutes of daily television（ usage） in 1985.我现在弄不明白的就是括号里的两处,答案说选择usage那个括号,没详解,我开始想的是use 和 usage 作名词用法会有差异,但是我查了字典之后还是看不出来有什么问题,觉得两个都可以用,而那个,asmany as 30 minutes我觉得应该改成as much as,是在说时间的长短,回答how much time do you spend on watching TV everyday这个问题,用as much as 3 hours,或者是更常用的as long as,而回答how many times do you go to the pa

改错题,关于as much as 和 usage的用法疑问
华中师范大学某一年基础英语真题,给一句话,四个划线的选项,选出含有错误的一项.One survey indicated each Chinese family averaged （as many as ）30 minutes of daily television（ usage） in 1985.我现在弄不明白的就是括号里的两处,答案说选择usage那个括号,没详解,我开始想的是use 和 usage 作名词用法会有差异,但是我查了字典之后还是看不出来有什么问题,觉得两个都可以用,而那个,asmany as 30 minutes我觉得应该改成as much as,是在说时间的长短,回答how much time do you spend on watching TV everyday这个问题,用as much as 3 hours,或者是更常用的as long as,而回答how many times do you go to the park every month?用 as many as 5 times,是这样的么?
我买了近十年的真题,只有后五年的有答案,还不知道标准不,这个题问了好多人,没有找到说服力的解释.
求正解