なかなかの出来だ。君もずいぶん腕を磨いたじゃないか。の英語

It's an excellent piece of work. You've certainly been polishing your skills, haven't you?

It's an excellent piece of work. You've certainly been polishing your skills, haven't you!

You got quite good at that.

You got very good at that.

You did your best.

You worked very hard, didn't you?

You became good at that.

You are trying hard.

You try hard.

You're pretty good.

You did your best.

You put in a lot of hard work to get here, didn't you?

You tried hard.

Good work.

You did your best.

You did an excellent job.

So you had a good challenge, didn't you?

So a lot of things happened with you.

You did well. Good job.

You've done it!

You are really studying hard.

How do you manage to do that?

You are doing a really good job, aren't you?

Your work has greatly improved.

You've done a good job. Keep it up.

It was clever of you to solve the problem.＝You were clever to solve the problem.

I don't wonder you got promoted. You've been working very hard.

You're really a hard worker.

You are doing a splendid job.

It's to your credit that you did it alone.