We will have no water to drink unless we learn to save water.(保持句意不变)
问题描述:
We will have no water to drink unless we learn to save water.(保持句意不变)
We will have no water to drink _____we ____learn to save water.
答
We will have no water to drink __if ___we __don't__learn to save water.
意思是 如果我们不懂得节约用水的话 我们将没有水可以喝