We have to get enough clean water.We ______get enough clean water.(用must改写)

问题描述:

We have to get enough clean water.We ______get enough clean water.(用must改写)

We must get enough clean water.

must

we must get enough clean water.
【must=have to】但是must不能有时态变化的形式,但是都表示 必须,must有客观上的义务,have to 有主观的不得不.

就填must