it's high time
回答：
It's high time that...是应立即做.(某事)的时候了.早就到了做.的时候了.
high time：正是时候,早该
如：It's high time that the boy went to bed.
It's high time that the boy should go to bed.
注意：It's high time that.后接的从句中,谓语动词要用过去式或用 should 加动词原形,should不可省略；从句中需要使用虚拟语气,用以表示 "(此刻)该做…… 而没有做" 的意思.