求英语大神帮我把短句合成长句
问题描述：
求英语大神帮我把短句合成长句
1.the steep surrounding slopes were capped with Snow
2.the snow fed two streams
3.these stream plunged dowm to join in the valley below
答
The steep surrounding slopes were capped with snow feeding two streams plunging down to join in the valley below.