水滴落入水中，激起涟漪。

A ___drop of water falls into the water, creating ripples.

水滴落入水中，激起涟漪。

A ___drop of water falls into the water, creating ripples.

他故意把钥匙掉在地上，想引起注意。

He ___dropped his keys on the floor on purpose to get attention.

股价在下午突然下跌了10%。

The stock price suddenly ___dropped by 10% in the afternoon.

她决定放弃学习法语，因为太难了。

She decided to ___drop French lessons because they were too difficult.

一滴水从树叶上滑落。

A ___drop of water slid off the leaf.