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。

    Last week，my friends invited me go camping to see the sunrise．I felt so exciting and asked for my parents'permission．Luckily，he agreed．We got to the mountain top that we would stay for a whole night．We were singing together while one of my friends were playing the guitar．The next morning，we wake up at about five o'clock．We could not wait to see the sun to come up．After a while，we saw the red color light up the sky gradual．It was so amazing scenery．The beauty in nature impressed me at that moment．

已知，如图，下列条件中不能判断直线l₁∥l₂的是（    ）