It's a cinch. 这十拿九稳.
The final was a breeze. 这场期末不难. It's as easy as one two,three. 这就像数一、二、三那么简单.
And you said it was impossible. 你还说这办不成呢. It's not that simple. 这没那么简单.
Now comes the hard part. 现在碰到困难的部分了. It's a tall order. 这个要求难以完成.
