【題目】There is _____ “u” and _____ “s” in the word “useful.

A.an, an B.an, a C.a, an D.a ,a

【答案】C

【解析】

試題分析：句意：在useful這個(gè)單詞中有一個(gè)u字母和一個(gè)s字母。此題考查冠詞，因?yàn)閡是以輔音音素開頭的，用a，s是以元音音素開頭的，用an。根據(jù)句意，應(yīng)選C。

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