In the moring the students enter school,_____carrying a schoolbag on his backA.all B.either C.each D.every

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In the moring the students enter school,_____carrying a schoolbag on his back
A.all B.either C.each D.every

c
every只能做形容词啦

D 后面有his ,所以前面是单数,多于2个的,用every

当然选C
如果选every的话最起码也得在every后面加个one啊

C 每个人都背了个书包
因为最后面有个“his back",指个体了,all是所有人,代复数,either两者中的一个,every 不能当代词