---I saw Bettyto Grandpa Lis home just now.---Yes. She’s often seen the old man with the

---I saw Betty to Grandpa Li's home just now.
---Yes. She’s often seen the old man with the housework.
A. go, help
B. going, to help
C. go, to help
D. going, helps

A. go, helpB. going, to help (答案→)C. go, to help D. going, helps解析：see后面宾语可以接现在分词,不带to的不定式和过去分词作宾语补足语,不过含义不同. see sb. doing 表示看见某人正在做某事;see sb. do 表示看见某人做过某事;see sb. done 表示看见某人被…句意:刚才我看见贝蒂去了李奶奶家.——是的，经常有人看见她帮助老人做家务。动词不定式做宾语补足语表示具体的将要进行的动作，see后接不带to的不定式做宾语补足语表示，看见某人做过某事，当变为被动语态时，省略的不定式符号要加上，故选C。

哦，回答的不错