◎ 题干
Some students have trouble ____ grammar while others have difficulty ____ new words.
[     ]
A. in; remember
B. for; to remember
C. on; remembering
D. with; remembering
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“Some students have trouble ____ grammar while others have difficulty ____ new words. [ ]A. in; rememberB. for; to remember C. on; remembering D. with; r…”主要考查了你对  【介词和介词短语】【动名词】  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。