9．There is __________"s"and __________"u"in the word"use"．（　�。�
A．a，anB．an，anC．an，aD．a，the

分析 單詞"use"中有一個"s"和一個"u"．

解答 答案C   本題考查不定冠詞表示數(shù)詞"一"，表泛指；根據(jù)"s"的以元音音素開頭發(fā)音，其前用an，而"u"以輔音音素開頭發(fā)音，其前用a，可知答案為C．

點評 本題考查不定冠詞表示數(shù)詞"一"的基本用法以及不定冠詞a/an的用法區(qū)別．

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