问题
选择题
There is _______ "s" and _______ "u" in the word "summer". [ ]
A. a; a
B. a; an
C. an; an
D. an; a
答案
答案：D
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There is _______ "s" and _______ "u" in the word "summer". [ ]
A. a; a
B. a; an
C. an; an
D. an; a
答案：D