| 1. Chinese, the most ancient of living writing systems, consists of tens of thousands of ideographic characters, each character a miniature calligraphic composition inside its own square frame.
(A) each character a miniature calligraphic composition inside its
(B) all the characters a miniature calligraphic composition inside their
(C) all the characters a miniature calligraphic composition inside its
(D) every character a miniature calligraphic composition inside their（A）
(E) each character a miniature calligraphic composition inside their
可以总结一下each的用法么？特别是单复数。谢谢 | 
