Even a drop of water ______because it is so important to all the living things.
A.mustwasteB.mustbewastedC.mustn’twasteD.mustn’tbewasted...
A. must waste
B. must be wasted
C. mustn’t waste
D. mustn’t be wasted 展开
B. must be wasted
C. mustn’t waste
D. mustn’t be wasted 展开
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