Correct

一场空

/ yīchángkōng / 
Strokes

Definition

all one's hopes and efforts come to nothing/futile

Example

Definition

come to naught; be all in vain; be futile

1
Nàxiē
那些
jiànyì
建议
jiēguǒ
结果
yī
一
chángkōng
场空
  
。

The suggestions have come to nothing.