Possibly encouraged by Liu Xiang, a number of students want to have a try in the hurdle race.
A. 110-meter-long
B. 110-meters-long
C. 110-meter length
D. 110 meters length
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(答案→)A. 110-meter-long
B. 110-meters-long
C. 110-meter length
D. 110 meters length
解析：考查复合词。英语中复合词的构成有一定的规则。一般是构成复合词的每个单词都用原形，中间用短横线连接，length是名词长度的意思。选项BCD结构错误，故选A。