13．We often have a           holiday on National Day．（　�。�
A．seven daysB．seven-daysC．seven-dayD．seven day's

分析 國(guó)慶節(jié)我們通常有七天假期．

解答 答案：C．
根據(jù)We often have a           holiday on National Day，可知本句考查了復(fù)合形容詞的用法，這里用復(fù)合形容詞修飾名詞holiday．連字符號(hào)連接數(shù)詞、名詞和形容詞，用作形容詞，這時(shí)的名詞不用復(fù)數(shù)形式．結(jié)合選項(xiàng)可知應(yīng)選C．故選C．

點(diǎn)評(píng) 本題考查指導(dǎo)學(xué)生了解two-month用做形容詞時(shí)，加短線用單數(shù)，并且后面必須有名詞．

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