The students said they would haveholiday.A. a two-weekB. two weeksC. two -weeksD. two-week

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(答案→)A. a two-week
B. two weeks
C. two -weeks
D. two-week's
解析：此题重点考查合成形容词的基本构成，数词+名词(+形容词)；合成形容词中的名词(year, hour, metre, month等)必须用单数形式。