it was + 一段时间+before/when的用法 下面几道我是做的题目,帮忙给我看下对错,

it was + 一段时间+before/when的用法 下面几道我是做的题目,帮忙给我看下对错,练习：请用before,since,that,when填空.1.It was last Sunday __when/that___ I came across Mr Brown.2.It was midnight __when___ the young couple came back from the ball.3.It won’t be a minute _before____the lunch is ready.4.It is two weeks __since___the Smiths lived in our village.5.It was not until 1920 __that___ regular radio broadcasts began.6.Was it during the Second World War __that___ he died?7.It has been one year __since___ I got the job.8.It wasn’t long __before___ they drove the enemy off their country.9.It will be two years __before___ we meet again.10.It is years __since___ I enjoyed myself so much.