题目内容
【题目】This Russian program is difficult ______ for Chinese students.
A. understanding it B. understanding
C. to be understood D. to understand
【答案】D
【解析】句意：这个俄语程序对中国学生来说很难理解。此处是不定式做表语应用主动形式表示被动，故选D.
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题目内容
【题目】This Russian program is difficult ______ for Chinese students.
A. understanding it B. understanding
C. to be understood D. to understand
【答案】D
【解析】句意：这个俄语程序对中国学生来说很难理解。此处是不定式做表语应用主动形式表示被动，故选D.
