◎ 题干
Sam will make more progress if he__________harder.

A. will work
B. was working
C. works
D. worked
◎ 答案
查看答案
◎ 解析
查看解析
◎ 知识点
    根据魔方格专家分析,试题“Sam will make more progress if he__________harder.[ ]A. will workB. was workingC. worksD. worked…”主要考查了你对  【一般现在时】  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。