◎ 题干
When Peter speaks in public, he always has trouble ______ the right things to say.
[     ]
A. thinking of
B. to think of
C. thought of
D. think of
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◎ 解析
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◎ 知识点
    根据魔方格专家分析,试题“When Peter speaks in public, he always has trouble ______ the right things to say.[ ]A. thinking ofB. to think ofC. thought ofD. think of…”主要考查了你对  【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。