3 They stood on the top of the mountain,____ .
问题描述：
3 They stood on the top of the mountain,____ .
3 They stood on the top of the mountain,____ the sun ___ in the east.
a.watched...rise b.watching ...rising 选哪个,
答
选B.watching ...rising
They stood on the top of the mountain,watching the sun rising in the east.
他们站在山顶上,看着太阳正从东方升起.
watching是伴随状态,watch的施动者是"they",所以用现在分词做伴随.
watch sb.do sth.看着某人做某事（全过程）
watch sb.doing sth.看着某人正在做某事
sun是动词rise的施动者,所以也是主动结构．
watch the sun rising in the east意为”看着太阳正从东方升起来”．
（后半句若是watching the sun rise in the east则指”看着太阳从东方升起的整个过程”,也说得通的）