◎ 题干
They tried several times to _______ the problem, and in the end they succeeded.
[     ]
A. give up
B. work out
C. look through
D. think of
◎ 答案
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◎ 解析
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◎ 知识点
    根据魔方格专家分析,试题“They tried several times to _______the problem, and in the end they succeeded.[ ]A. give up B. work outC. look through D. think of …”主要考查了你对  【动词短语】  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。