---What do you think the ______should do first?---They should learn to take ______as well as share rights in life.A.grown-up;responsibilityB.growns-up;responsibilityC.grown-ups;responsibilitiesD.growns-ups;responsibilities
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C解析主要测试名词。有些考生以为grown是复合名词的中心词，其复数形式应该在grown后面加-s；另一方面认为responsibility是不可数名词，没有复数形式，从而错选B。其实，grown-up没有中心名词，其复数形式应该在up后面加\|s；同时根据语境可知，responsibility指义务，该单词作"义务，职责"讲时，可作可数名词或不可数名词，故正确