你一直在抽鼻子——我以为你感冒了。

You were ___sniffing a lot - I presumed you had a cold.

突然我们听到有东西在嗅。

Suddenly we heard something ___sniffing.

他大声抽鼻子以清理鼻腔。

He ___sniffed loudly to clear his nose.