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Please do not feed the fish; they ________ die if they eat too much.
A.shallB.mustC.mayD.need
C

试题分析:考查情态动词。Shall将会;must必须,必定;may也许;need需要;句意:不要喂鱼了,如果他们吃的太多,可能会死掉的。句子表示的是一个不确定的可能性的推测。Must表示确定的推测。故C正确。
点评:情态动词的考查经常与推测和虚拟语气联系在一起,同时也要注意情态动词的一词多义现象,如must出了表示必须之外,还可以表示偏偏,非得;
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