fog

浓雾笼罩着山谷。

Thick ___fog covers the valley.

冬天时窗户经常因为温差而起雾。

The windows often ___fog up in winter due to the temperature difference.

今天早上有雾，开车要小心。

There is ___fog this morning, so drive carefully.

雾散了，太阳出来了。

The ___fog has cleared and the sun is out.