1、误判名词的单复数形式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；responsibilities D. growns-ups；responsibilities分析：有些同学以为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，故正确答案选C。复合名词的复数形式一般在中心名词后面加-s，如：looker-on lookers-on， son-in-law
