still

孩子们很难长时间保持不动。

Children find it difficult to stay ___still for very long.

如果你不保持不动，我就没法给你梳头。

I can't brush your hair if you don't hold ___still.

我的狗待不住，没法给它画画。

My dog won't stay ___still long enough to be painted.

他可能会迟到，或者更糟的是，他可能根本不来了。

He might be late, or worse ___still, he might not come at all.