如果靴子不防水，就没用。

Boots ___are ___no ___good if they aren't waterproof.

在战斗停止之前，食品援助没有多大用处。

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

下雨时，你会淋湿，这对任何人都没有好处。

When it is raining, you get wet and that ___is ___no ___good to anyone.