下列细菌和真菌中，营寄生生活的是（　　）

①人体中的链球菌  ②人体皮肤中的真菌    ③使玉米得黑粉病的珊瑚菌   ④地衣中的真菌    ⑤大豆根瘤中的根瘤菌  ⑥腐烂香蕉中的枯草杆菌．

增加：在缺词处加一个漏字符（∧），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。

    One day, I was doing my homework in the bedroom. All of sudden, the light went out, leaving me in totally darkness. My mother came in with a candle. When I light the candle, the bedroom was brightened at once. I looked at the candle and was lost in thoughts. It is very small, and it isn't worth many. But what it gives us are great. It brightens the way of many scientist; it brightens the desks of my teachers; it also brightens my mind. I think I should learn with the candle. Small as it is, but it tries its best to giving us light and heat.