— Why is your bedroom so dirty?— Sorry, Mum. It ___________. I felt very tired after playing soccer.
A:isn't cleaned
B:didn't clean
C:doesn't clean
D:wasn't cleaned
I have____(只,仅仅)one ruler.
戊戌变法的失败表明( )
①资产阶级改良道路在中国行不通
②中国近代化的道路是漫长而坎坷的
③封建顽固势力比较强大
④资产阶级维新力量弱小