If you heat ice,, it melts., If you freeze water,, it becomes a solid., Plants die, if they don't get enough water., If you mix red and blue,, you get purple., If it rains,, the grass gets wet., If Bill phones,, tell him to meet me at the cinema., Ask Pete, if you're not sure what to do., If students study hard,, they learn quickly.

zero conditional

视觉风格

显示所有

活动设置

排行榜

切换模板

恢复自动保存:?