题目

英语短文填空,
Dogs are frieds of man.They w____ for us.They hunt for us.They play w____ us.But once,all over the world,dogs were w_____.
T_____ of years ago ,man began to train the wild dogs.The strong dogs became working a_____ .They were trained to p_____ the heavy loads.They learnt to keep watching sheep and other animals.W______ dogs had other jobs,too.
Some dogs were not strong.But they could help man hunt f_____ games.Other dogs were the best a_____ pets.At first,there were o____ a few kinds of dogs.Today,there are more than 100 inds.

提问时间：2021-03-19

答案

依次为work with wild thousands animals pull working for animal only