小鸟突然从树枝上跃起，迅速扑向地面的虫子。

The bird ___pounced from the branch to catch the insect on the ground.

那只猫突然扑向老鼠。

The cat suddenly ___pounced on the mouse.

猫突然向前一跃，抓住了那只老鼠。

The cat ___pounced forward suddenly to catch the mouse.