where is your brother?-He is f_____his pet dog over there.

问题描述:

where is your brother?-He is f_____his pet dog over there.

横线上那个词是:finding
因为问的是“你的兄弟在哪?”
而回答是“他在那里-----他的宠物狗。”
可见句子是主系表,
所以横线上应该填动词,
再结合句意应该填“find”
但前边是is,
所以应该用ing形式
即finding

following

feeding 正在喂他的宠物狗.