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。

    My friend and I always played outdoor when we were young. During spring rains, we climbed up to our comfort tree house and played cards. Then in the amused autumn, we rolled around in the orange leaf. This all end one day, when my friend received video game player for his birthday. In the begin, he sometimes invited me over to play with him. But this began to happen less and less, because of his house was small, and his mother didn't like visitors. Now we never see each another, as he is always played his video games. I miss my friend.

用光学显微镜观察细胞失水时发现，植物细胞不如动物细胞收缩那么显著，原因是（　　）