The biggest problem for most plants,which_______just get up and run away when threatened,is that animals like to eat them.
A．shan’tB．can’t
C．needn’tD．mustn’t
B
can’t意為“不能”。根據(jù)常識可判斷出植物不會站起來和逃跑。故選B項。shan’t 是shall的否定形式,作情態(tài)動詞在陳述句中用于第二人稱或第三人稱,表示說話者的意志、命令、約定、決心、警告、威脅、預(yù)言等,意為“不應(yīng)該,不要”。needn’t 意為“不需要”。mustn’t 意為“不準(zhǔn),禁止”。
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