选择题：It’s not easy for trailwalkers to finish walking a _________ trail within 48 hours.A. 100-kilometre B. 100-kilometres C. 100 kilometres D. 100 kilometres’

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选择题：It’s not easy for trailwalkers to finish walking a _________ trail within 48 hours.A. 100-kilometre B. 100-kilometres C. 100 kilometres D. 100 kilometres’
选择题：It’s not easy for trailwalkers to finish walking a _________ trail within 48 hours.
A. 100-kilometre B. 100-kilometres C. 100 kilometres D. 100 kilometres’

选择题：It’s not easy for trailwalkers to finish walking a _________ trail within 48 hours.A. 100-kilometre B. 100-kilometres C. 100 kilometres D. 100 kilometres’
是选A吗.假如含有连字符的是一个形容词,那么它里面的名词就一定要是单数,像
a fifty-metre-long pool其中的metre虽然名义上它应该用复数,可是一有连字符就不用复数,也不能复数.另外,这种形容词只能充当定语.
比如this is a a fifty-metre-long pool.
但不能this pool is fifty-metre-long.要说成this pool is fifty metres long.gloria_hui 的回答）.
不选D是因为名词所有格表从属,路不属于100千米.
而C不能做定语表修饰,应说the trail is 100 kilometres

A 做为定语，用连字符形式

答案为A，类似用法有a five-minute walk/ride

选A

应选A
用连字符形式做定语时，应用单数。常见的有：a five-year girl (一个5岁女孩）

选D 名词所有格的用法

It's Not Easy Bein' It'S Not Easy 歌词 it's not /it's no两句话It's no fun to find oneself at the end fo the rope.It's not easy to educate teenagers.no和not怎么个用法啊? It's not so easy to loving It'S Not That Easy 歌词 It's not easy to be everybody! it's not easy to do It's easy,so it's not d____.填什么 It's not easy to be an astronaut’s son .. It's not easy to speak english well.改同义句 English well is not easy. 选择题：It’s not easy for trailwalkers to finish walking a _________ trail within 48 hours.A. 100-kilometre B. 100-kilometres C. 100 kilometres D. 100 kilometres’ It's not easy for_____(we)to learn English well. It's not so easy ()(养育作为宠物) at home it's not easy to forgettsomeehing that really happy： Home schooling sounds easy,but it's really not I think Maths is not easy ,but it's it's not easy to find .后面填什么? “it’s not easy being green” 原文是：Apparently,it’s not easy being green,for humans either.