1.They each ( ) a new book A has B have C is D are

one of后接复数名词动词谓语单数

have
each 只是一个同位语 看前面的主语判断单复数

each of us has each表单数 在这里是中心词 of us是定语修饰each的 所以谓语用单数
they each have they在这里是主语 根据主谓一致 谓语用复数

你的提问不准确,楼上兄弟的回答也错误哈!应当说,They做主语,each做同位语时,谓语动词用复数,如：
They each put forward a proposal.（请注意each做同位语时的位置,一般置于be之后或实义动词之前）,又如：
We each have our private views about it.
如果each做主语,谓语动词一般应当用作单数,如：
Each of them thinks differet thoughts.
另,请特别注意以下两种结构：
1、each(every)+ 单数名词 + and + 单数名词,此时谓语动词用作单数,如：
Each boy and girl has come and will sign his full name before attending the ceremony.
2、each(every)+ 单数名词 + and + each(every) + 单数名词,此时谓语动词用作单数,如：
Each hour and each minute has its value.
最后,请注意,each of后的名词前须加the,如each of the soldiers（不说each of soldiers!）

A D speak daily English every day

has

each 作主语是谓语动词用单数；
作同位语时,根据主语判断动词的单复数形式.
They each have a book. Each of them is from China.
第一句each 为同位语,主语是they； 第二句each 为主语,谓语动词是单数.

B

代词
同位语

get

1.they each 中they 是主语,所以谓语动词用复数形式（are,do,have等）
2.each they中each 是主语,所以谓语动词用单数形式(is,does,has等)

应该是 A.have They each ,each做同位语,主语是they,所以用have
Each of them 用has

has

have,主语是they,each只是状语

They做主语,each做同位语时,谓语动词用复数,如：
They each put forward a proposal.（请注意each做同位语时的位置,一般置于be之后或实义动词之前）,又如：
We each have our private views about it.
如果each做主语,谓语动词一般应当用作单数,如：
Each of them thinks differet thoughts.
另,请特别注意以下两种结构：
1、each(every)+ 单数名词 + and + 单数名词,此时谓语动词用作单数,如：
Each boy and girl has come and will sign his full name before attending the ceremony.
2、each(every)+ 单数名词 + and + each(every) + 单数名词,此时谓语动词用作单数,如：
Each hour and each minute has its value.
最后,请注意,each of后的名词前须加the,如each of the soldiers（不说each of soldiers!）