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16. February normally has twenty-eight days, but every fourth year, _____ has twenty-nine.
(A) there
(B) its
(C) is a leap year
(D) a leap year, it

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1F
702436455 大三上 (2012/01/19)

leap year  閨年

2F
今年必上 高三上 (2020/05/16)
A leap year is a calendar year that contains an additional day


16. February normally has twenty-eight d..-阿摩線上測驗