7．Although we live in the same country，the staple food variesfrom one place to another．

分析 盡管我們生活在同一個(gè)國(guó)家，但是各地的主食卻是因地而異．

解答 答案：varies．
分析句子的結(jié)構(gòu)可知，本句為although引導(dǎo)的讓步狀語(yǔ)從句，是一主從復(fù)合句；其中，從句中的時(shí)態(tài)為一般現(xiàn)在時(shí)，所以主句中的時(shí)態(tài)也應(yīng)該是現(xiàn)在時(shí)，結(jié)合句意可知，本句考查短語(yǔ)vary one place to another因地而異；故答案為varies．

點(diǎn)評(píng) 首字母填空題考查的是詞匯的記憶和運(yùn)用能力，平時(shí)要注意積累和運(yùn)用．同時(shí)還要注意提示字母．

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