摘要： drop → so
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Even a drop of water ______because it is so important to all the living things.
| A．must waste | B．must be wasted |
| C．mustn’t waste | D．mustn’t be wasted |
Even a drop of water ______because it is so important to all the living things.
|
A．must waste |
B．must be wasted |
|
C．mustn't waste |
D．mustn't be wasted |
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Even a drop of water ______because it is so important to all the living things.
| A．must waste | B．must be wasted |
| C．mustn’t waste | D．mustn’t be wasted |