()800-metter races 括号里填an还是a

()800-metter races 括号里填an还是a a/an 100-metter-long bridge Have you got _____one-yuan coin括号里填a 还是an 填空：You're dropped ( )"s" in the word "necessary"括号里填 a 还是 an （ ）encourager括号里面填a还是an? She is ( ) university student.(括号中填a还是an?) There is ( )way .括号中填a还是an, Do you have ______envelope 括号里天a还是an ( )a beautiful house!括号里填How还是What ( ) a nice schoolbag 括号里填how还是 what? my father is 【】 engineer.括号里填什么?1、a 2、an 3、不填 She ( )an English括号里填什么?