James is boy.A. a 18-month-oldB. an 18-months-oldC. an 18-month-old 题目和参考答案——青夏教育精英家教网—

题目内容

James is ________ boy.

A. a 18-month-old

B. an 18-months-old

C. an 18-month-old

【解析】

试题分析：句意：杰姆斯是一个十八月大的男孩。由数词和名词构成的合成形容词中名词不能用复数形式，必须使用单数形式。18-month-old是以元音音素开头的单词，其前面可以使用不定冠词an，不能用a。所以选C。

考点：考查复合形容词。

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