in 100 years'time为什么100和years'不加连字符?还是说应该加上?

in 100 years'time为什么100和years'不加连字符?还是说应该加上? in 100 years' time的同义是什么 in five years' time in ten years' time例句 in three years'time.In three years一样吗 in 20-year time和in 20 years' time区别 In a few years' time结构解析 in three years' time 是什么时态 英语作文in my 15 years' time in ten years 同义词是空空time In a few years` time,millions of trees those mountainsIn a few years` time,millions of trees _________（cover） those mountains为什么不能是have covered Can you inagine what life will be like in ---time?A.20years' B.20year's C.20-years' D.20-years选哪个,为什么. the Great Wall in Chian will be covered by forests ( ).A.after a few years B.In a few years'time 为什么 A 行不行? He will buy a car _______ A in the future B in 2 years time C after two years选哪个 为什么 英语Jane spend three years in China,during which time she was learning ChineseJane spend three years in China,during which time she was learning Chinese.我就是搞不懂,为什么during which =when后还要加time, The Olympic Games will be held in our country in four years' time.翻译并解释year后面为什么加's time, Travelling in Wien in 10 years'time英语作文. our school will be more beautiful______.a.two years ago b.after two years time c.in two years time d.in two years' time