增加：在缺词处加一个漏字符号（∧），并在其下面写出该加的词。

删除：把多余的词用斜线（\）划掉。

修改：在错的词下划一横线，并在其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 was always afraid of water because I nearly get drowned when I was young. As I grew old, this fear was still with me. However, my attitude to water changed last summer. One day, several classmates asked me lean to swim with them, and of course, I said no. But they were quite determined and repeated explained the benefits of swimming for me. So finally I agreed to give them a try. You can imagine what scared I was when I first had stepped into the swimming pool. But gradually, I found it great funs in the water. Now I'm no longer a gird live in fear of water.

如图，若通过静脉给人注射一种药物，药物通过心脏四个腔的先后顺序是（  ）

①汽油以及柴油价格下调，将使物流企业的生产成本有所降低

②降低企业社保缴费率和住房公积金缴存比例，有利于企业发展

③电信企业下调国际及港澳台漫游流量资费，将使该企业利润下降

④营业税改增值税试点扩大到房地产业．有利于去库存，提高商品房价值