◎ 题干
Bill won't make any progress______ he studies harder than before.
[     ]
A.if
B.when
C.because
D.unless
◎ 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“Bill won't make any progress______ he studies harder than before. [ ]A.if B.when C.because D.unless …”主要考查了你对  【从属连词】  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。