你能在水下屏住呼吸多久？

How long can you ___hold ___your ___breath under water?

我正屏住呼吸。

I was ___holding ___my ___breath.

在医疗测试期间，他被要求屏住呼吸十秒钟。

During the medical test, he was asked to ___hold ___his ___breath for ten seconds.