【題目】The boy is trying his best to be __________ useful person in the future.

A.anB.theC./D.a

【答案】D

【解析】

句意:這個男孩正在盡他的最大努力在未來做一個有用的人。

根據(jù)不定冠詞a/an一個,通常用于泛指,a用于輔音因素開頭的單詞前,an用于元音因素開頭的單詞前,定冠詞the這個、那個,通常用于特指;這里是泛指,useful輔音因素開頭;故選D。

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