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
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
B
句意为：对于绝大多数受到威胁时不能起来就逃跑的植物来说，最大的问题是动物喜欢吃它们。Sahan’t表将来;needn’t不必，mustn’t禁止，都不正确。