◎ 题干
You have failed two tests. You'd better start working har-   der,________you won't pass the course.      
[     ]

A. and            
B. so            
C. but            
D. or

◎ 答案
查看答案
◎ 解析
查看解析
◎ 知识点
    根据n多题专家分析,试题“You have failed two tests. You'd better start working har- der,________you won't pass the course.[ ]A. andB. so C. butD. or…”主要考查了你对  【并列连词】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。