there are losts of english books here ,and ( )of them is easy to understand Aboth B ALL C evere Deach(解析
问题描述：
there are losts of english books here ,and ( )of them is easy to understand Aboth B ALL C evere D
each(解析
答
应该选择each 首先他说的是is 所以不可以有all 和coth each表示每一个 所以选择each
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答
D。。。注意后面的谓语动词用了IS，表单数，只能用EACH
答
and ( )of them is easy 谓语动词是is ,单数
both,意思为两个,前面说的是lots of没说两个,显然牛头不对马嘴
all,全部,对应系动词应该为are
every,每一个,没有every of的说法
each,每一个,each of 是短语,句子前后也连贯