There is an 80-metres-long swimming pool in his dream home改错

there is ( ) building in the cityA 80 metres tallB an 80-metres-tallC 80 metre tallD an 80-metre-tall There is _____ 800-metre-long. 应用a 还是an ? ( ) There is ____________ tree in our school .A.a 8-metres-tall B.an 8-metre-tall C.an 8 metre tall 我知道是选B,可是请高人指点,为什么选B呢? The swimming pool is about( )and there is also an( )playground.A.fifty metres long;eighty-metre-long B.fifty metres long;eighty metres long C.fifty-metres-long;eighty-metre-long D.fifty metres long;eighty-metres long THERE IS A FIRST HUNDRED METRE RACE[改错] There is a 20-metre-long swimming pool there.The swimming pool is ()()() There is also a 50-metre-long swiming pool 同义句 There is a ___river A.6000-metre-long B.6000 metre long C.6000-metres-long D.6000-metres long在解释一下.谢谢! Liu Xiang is an Olympic winner in the ___ hurdles .We are proud of him.A.110-metre B.110-metresC.110 metre D.110 metres There is also a 50-metre-long swimming pool 同义句=The swimming pool is ( ) ( ）（） There's _______ 800-metre-long road behind ______ hospital.(选择并解说）A、an ; an B、a ; a C、an ; the D、a ; the There's _______ 800-metre-long road behind ______ hospital.(选择并解说）A、an ; an B、a ; a C、an ; theD、a ; the was.race.metre.there的翻译 There is an air port. Life there is an absolute There is an A,an U and______R 1、There is a big tree behind my house .It is about _____.A .20 metre high B .high 20 metre C.high20metres D.20 metres high______解析：____________________________________________________2、I like sking better than climbing because Ithink climbi The building is twenty metre tall.改错