他快速地画了一幅猫的素描。

He did a quick ___sketch of the cat.

许多艺术家在开始最终画作前，会先画一幅简单的草图。

Many artists begin with a simple ___sketch before starting the final painting.

建筑师向我们展示了新大楼立面的粗略草图。

The architect showed us a rough ___sketch of the new building's facade.