(2013·山东济南二模)The poem A Red, Red Rose written by Robert Burns is popular with the Chinese young people, because the poem is easy .
A. to be understood
B. to understand
C. understand
D. understanding
网友回答
A. to be understood
(答案→)B. to understand
C. understand
D. understanding
解析：选B 考查非谓语动词。在“be＋性质形容词(此类形容词有easy, hard, difficult等)＋不定式”结构中，常用不定式的主动形式表示被动意义。