Question

【题目】There is “u” and “s” in the word “useful”.
A.an, a
B.an, an
C.a, a
D.a, an

Answer 1

【答案】D
【解析】句意：在单词useful中有一个字母u和一个字母s。u是辅音音素开头，故用不定冠词a修饰，s是元音音素开头，故用不定冠词an修饰，故选D。