题目内容：

阅读下面材料，在空白处填入适当的内容（每空的字数不限，要和课文一致）。

I 1. my sister but she has one serious shortcoming. She can be really 2.. Although she didn’t know the best way of getting to places, she insisted that she 3. the trip properly. I asked her whether she had looked at a map yet. Of course she hadn’t; my sister doesn’t 4. details. So I told her that the source of the Mekong is in Qinghai Province. She gave me a 5. look-- the kind that said she would not 6.. When I told her that our journey would begin at an 7. of more than 5,000 metres, she seemed to be excited about it.