Jane couldn't go ,so I attened the meeting instead of her.改为

I attended the meeting instead of Jane,because she couldn't go.
补充：a large number of = a lot of/ lots of/ plenty of
再问： a lot of 不是等于a number of 吗？
再答： 都有“许多的，大量的”意思。 a number of 表示“一些，几个”的意思，相当于some，a few。