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Don`t be worried.The news ____ be ture.A.may notB.must notC.need notD.shall not[答案为A，我选了B，求语法解释。3X]
Should anyone call then,ask him to leave a message.[这个句子语法完全不理解，求语法解释。3X]
When fighting the fire,thefirefighter risked ____ to death to save a child,for which he was highly praised.A.being burntB.to be burntC.burningD.to burn[答案为A，我选了B，求语法解释。3X]
There is still —— third one who said he was also —— first to arrive besides these two people.A. a ; /B. the ; aC. a ; theD. the ; the[答案为C，我选了D。求语法解释。3X]
