题目内容：
根据材料，回答问题。C
A month ago I had no idea that on a Saturday"afternoon in November I would be hanging 39 me. ters above the ground and enjoying it．Now I looked down on the river far below me．and realized why people like rock—climbing．
My friend Matt and I arrived at the Activity Centre on Friday evening．The accommodation(食宿)wasn’t wonderful，but we had everything we needed，beds，food and so on．And we were pleased to be out of the city in the fresh air．
On Saturday morning we met the other ten members of our group．Cameron had come along with． two friends，Kevin and Simon，while sisters Carole and Lynn had come with Amada．We had come from different places and none of knew the area．
We knew we were going to spend the weekend outdoors，but none of us was sure exactlv how． Half of as spent the morning caving(钻山洞)while the others went rock．Climbing and then we changed at lunchtime．Matt and I went to the cave first．Climbing out was harder than going in，but after a good deal of pushing，we went out at last-covered with mud(泥浆)but pleased and excited by what we’d done．
What is the writer trying to do in the text? A．Describe some people she met．
B．Tell people to go to the Activity Centre．
C．Say how she spent some free time．
D．Ask people to join her group．
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答案解析：