鞋子如果进水就没用了。

Shoes ___are ___no ___good if they let in water.

在战斗停止前，食品援助作用不大。

Food aid ___isn't ___much ___good until the fighting stops.

淋雨对身体没有好处。

Getting wet in the rain ___is ___no ___good for your health.