他猛地将钥匙插进了锁孔。

He ___plunged the key into the keyhole forcefully.

温度在傍晚时突然骤降。

The temperature ___plunged suddenly in the evening.

他勇敢地从悬崖上跳入海中。

He bravely ___plunged from the cliff into the sea.

她充满热情地投入到新工作中。

She ___plunged into her new job with great enthusiasm.