问题补充:
‘I’the first letter in the word‘irregular’,and there is‘u’and ‘l’in it.
A. is, a, an
B. am, an, a
C. is, an, a
D. am, a, an
答案:
(答案→)A. is, a, an
B. am, an, a
C. is, an, a
D. am, a, an
解析:句意:‘I’是单词‘irregular’的第一个字母,并且有字母‘u’ 和‘l’在里面。主语是字母‘I’,所以用is。字母‘u’ 是辅音,前用a.字母‘l’是元音,前用an.故选A。