如何使用 "until" 造句

1. The official 2012 celebrations are being delayed until june .
2012年的官方庆典推迟至6月举行。
2. Until 1935 , there was no federal unemployment insurance .
直至1935年,才出现了联邦失业保险。
3. That is until the other day .
直到前两天一直如此。
4. Why did it take until 2010 ?
为什么要到2010才被公布?
5. Until recently , it was inaccessible to visitors .
目前为止,还很难达到向参观者开放。