题型:单选题 知识点:
题目:
30. —______ do they kill elephants?
—They kill them ______ their ivory (象牙).
A. Why; for B. What; for C. Why; on
30. —______ do they kill elephants?
—They kill them ______ their ivory (象牙).
A. Why; for B. What; for C. Why; on