We should protect the earth we will have no water to drinkA. soB. orC. andD. but

问题补充：

We should protect the earth，we will have no water to drink．

A. so

B. or

C. and

D. but

答案：

A. so

(答案→)B. or

C. and

D. but

解析：本题考查连词的词义辨析。由上下句可我们应该不保护地球，“否则”我们将没有水喝，故答案选B，or引导的表示条件的假设。