如图所示电路，用所学知识回答下面问题：

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（＼）划掉。

修改：在错的词下画一横线，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。

    Last summer vacation I did some fruit-picking. It was an interesting but pretty hard work. I had to start at 7 am and pick eight hours. But it was such cheerful and full of funny. Some of we had guitars, so in the evenings we had barbecues and play a bit of music together. I only got about $80 a week, but at least they gave me all my meal, and the food was not that awfully. Basic accommodation was also supplying. However, I'm afraid I won't be going fruit-picking this summer, because I've got a temporary job in town what pays better.

将下列陈述句改成反问句

①我不能忘记老师的关爱。

②春天一到，冰就化开了。

能指示土壤酸性性质又可作药用的植物是（  ）