一层厚厚的云遮住了太阳。

A dense ___blanket of cloud obscured the sun.

我确实记得雨下得很大，天空被一层灰色覆盖。

I do remember it rained heavily and the sky was covered with a ___blanket of grey.

森林地面被一层落叶覆盖。

The forest floor was hidden under a ___blanket of fallen leaves.