英语 单项选择 (6 21:52:22)i think math is ----------useful subject a.a &
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英语 单项选择 (6 21:52:22)i think math is ----------useful subject a.a &
英语 单项选择 (6 21:52:22)
i think math is ----------useful subject
a.a b.an c.the d./
英语 单项选择 (6 21:52:22)i think math is ----------useful subject a.a &
选a,半元音前不用an,又因为subject是可数名词,没有特指、上下文,所以用冠词a
a use 【音标】:[ju:z] 辅音开头不用an
a.a
第一个,
useful里的u不是元音字母,所以要a