June the eleventh was one of _____days in 2013.The Shenzhou-X was sent up successfully.

问题描述:

June the eleventh was one of _____days in 2013.The Shenzhou-X was sent up successfully.
A、exciting B、more exciting C、the most exciting D、much exciting
请说明理由,

C
one of the +*+名词复数‘ ……最……之一’
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