The biggest problem for most plants,which_______just get up and run away when threatened,is that animals like to eat them.
| A．shan’t | B．can’t |
| C．needn’t | D．mustn’t |
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The biggest problem for most plants,which_______just get up and run away when threatened,is that animals like to eat them.
| A．shan’t | B．can’t |
| C．needn’t | D．mustn’t |
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