为什么50 meters race等于50-metre race

为什么50 meters race等于50-metre race 400-meters race 还是 400-meter race 为什么是5 minutes’而不是5--minute,是400--meter race 而不是400 meters’ ( )There will be an ----on the playground this afternoon .A 800--meter race B 800--meters raceC 800 meters race D 800--meters-race he was the c___of the 100 meters race. jim will take park in the 200 meters'race. She fulfilled her __ ambition __ to run the 10000 meters race within 30 minutes.Ambition是否应为复数形式?为什么? Many students signed up（报名）for the__a___ race in the sports meeting to be held next week.A.800-meter-long B.800-meters-long C.800 meter length D.800 meters length为什么不选b Wu Ding won the girl's _____ race in the school sports meeting last week.A.100 meter B.100 meters C.100-meters D.100-meter但是为什么不能用B? 100米跑英语是100- meter race 还是100-meters race? 50-meter-tall是否等于50 meters tall 4乘100米接力英语怎么说4 times 100 meters relay race?还是 four 100 meters relay race?还是别的?这个“乘”翻不翻? 能帮我修改一下这篇英语作文吗?急!Last year,we had a Sports Day.The students were all very excited. There was running race:50 meters,400 meters and 800 meters.And skipping match,swimming match and long jump,high jump. At that time,I wa This street is____.A.wide thirty metersB.thirty meters wideC.thirty-meter wide就是想问问C为什么不可以?以前老师讲过百米赛跑就是100-meter race,那这个thirty-meter wide不是一样的吗? Kate won the race in the summer sports meeting A 100-meter B 100-meters race it is only 5 meters away这里为什么不能用far? 填空-What does hundle race mean?-Just as Liu Xiang does in the 110 meters races ( ) the hundles.