useful information前面的冠词是用a还是an?

useful information前面的冠词是用a还是an? Was this information useful? 怎么翻译Was this information useful much useful information.可以这样说吗 是find useful information还是find the useful information?如题 How useful the information is. How useful the information it is. 哪个对? useful information是可数名词还是不可数名词?我知道information是不可数名词,但useful information就不知道了 What ________he gave me A a useful message B a useful information C a useful news D a useful advice useful前面用an还是a?为什么? useful前面加ah还是an i want a brochure to____some useful information.(find,findout) _____(encyclopaedia) are important for us to find useful information. Much useful information about these plants___(collect)since 1971. there is some useful information in the book分析句子成分 Tour local library is a useful source of information much useful information. Internet should be a window to the More____,the Internet gives us plenty of useful information.(important) You can get useful information form TV译成中文