碳的耗用量称为“碳足迹”．一般悄况下，排放的二氧化碳越多，碳足迹就越大．碳足迹的计算包括一切用于电力、建设、运输等方面的能源以及我们所使用的消耗品．以下做法可以减小“碳足迹”的是（）

如果不等式ax>1的解集是x＜$\frac{1}{a}$，则（      ）

增加：在缺词处加一个漏子符号（∧)，并在此符号下面写出该加的词。

删除：把多余的词用斜线（\）划掉。

修改：在错的词下划一横线，并在该词下面写出修改后的词。

注意：1.每处错误及其修改均仅限一词：2.只允许修改10处，多者（从第11处起）不计分。

    I had a interesting dream last night. I dreamed that I took part in a race. At first, I could not to run very fast and fell behind. So I didn’t lose heart and kept running. All the students on the playground cheer me on," Come on!” I was so encouraged that I ran faster and fast till I caught up all the other runners. I felt as if flying like a superman. In the end, I get to the finishing line first. I won the race. I felt very proudly of myself. Many of my classmate threw me up into the air. Just at that time I woke up and found me still in bed!