【題目】There is _____ river at the foot of the mountain(山)._____ river is dangerous.

A.a(chǎn); A B.a(chǎn); The

C.the; The D.the; A

【答案】B

【解析】

試題分析:句意:在山腳下有一條河,這條河很危險(xiǎn)。a / an 用在單數(shù)可數(shù)名詞前面,表示這個(gè)人或事物是泛指的不確定的一個(gè),相當(dāng)于中文的“一個(gè)”。a 用在讀音為輔音開頭的名詞之前, an 用在讀音為元音開頭的名詞之前。定冠詞特指某(些)人或某(些)事物。 如果第一次提到某人或事物的時(shí)候,用a / an,那么以后再提到的話,就變成特指的人或事物了。結(jié)合句意,故選B

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