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17．This is ____ English book and that is ____Chinese book．（　　）

A．

a；an

B．

an； a

C．

the；an

D．

an； the

分析這是一本英語書，那是一本語文書．

解答答案：B．考查冠詞．句意"這是一本英語書，那是一本語文書．"．第一個空，泛指一本英語書，English是以元音音素/?/開頭的，用an修飾．第二個空，泛指一本語文書，Chinese是以輔音音素/t?/開頭的，用a修飾．答案是B．

點評考查冠詞，冠詞包括定冠詞the，通常表示特指．不定冠詞a和an，a修飾以輔音音素開頭的單詞，an修飾以元音音素開頭的單詞．要根據語境完成試題．

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