Is it OK if I lock the door?

我锁门可以吗？

But is it OK to point out the mistake?

但是指出错误合适吗？

That's a zing. Is it OK?

好吃吗？

I treat you to tea, is it OK?

今天我请你喝茶好不好？

Is it OK to split infinitives?

把不定式分开是否恰当？

Is it OK if we just order appetizers ?

我们就点开胃品可以吗？

Is it ok to include text on the images?

在图像中写入文章说明可以吗？

Is it OK if Kevin sits in here to watch?

如果凯文坐在这里看行吗？

We will meet at 12 at the lobby,is it Ok?

我将于12点在大堂同你会面。你看如何？

I love to take exercise. Is it OK on Sunday?

太好了，我喜欢锻炼，星期天可以吗？