我的感冒似乎变得更严重了。

My cold seems to be ___getting ___worse.

如果交通状况恶化，我们就要迟到了。

If the traffic ___gets ___worse, we'll be late.

丢了钥匙后，我以为情况不会更糟了，但接着就开始下雨了。

After losing my keys, I thought things couldn't ___get ___worse, but then it started to rain.