I think it's _____ useful advice ,so I always remember it.

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I think it's _____ useful advice ,so I always remember it.
A.a B.an C.the

a
为了读音的方便,在以元音音素开头的可数
名词的单数名词前用an而不用a.当我们使用an时,条件有三：①这个名词的读音必须是以元音音素开头--即它的音标的第一个音素是元音,而不是说它是以元音字母开头.②它必须是个可数名词.③它还必须是个单数名词.我们常常见到这类用法：
a university 一所大学 an hour 一个小时
an orange 一只桔子 an engineer 一位工程师
an ordinary man一个普通人
an honest person一位诚实的人
useful( 'ju:sfəl ) 为辅音开头所以用 a

I think it's _____ useful advice ,so I always remember it. I think it's----useful advice.So I always remember it I think it's_____useful advice,so I will always remember it i think its___useful advice ,so i will always remember it.填a I think it is ___useful advise ,so I will always remember it 填冠词.2.This is a useful dictionary,I think.So it is,and it's( It looks so nice,_____ I think it's too expensive.填but还是so? I think it's a.useful job.翻译 I think it's useful for the environment. 改错：The twmperature today is so hotWhat an useful advice it i It's so coludy.I think it _____ (rain).只能填is going to rain I think it is wrong ( ) our advice.