---

The writer implies that the shepherd-sheepdog whistle language is still biased because ________.



A)
it can only be used to give orders
B)
it is not natural for both shepherd and sheepdog
C)
it is a one-way communication approach
D)
it can only be used between man and dog

---

出自：华北水利水电大学-水利水电建筑工程-大学英语2

显示答案