题目内容
-Is this ________ pencil case?
-No, it's ________ eraser.
[ ]
A.a;/
B.an; a
C.a; an
D.an;/
答案:C
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题目内容
-Is this ________ pencil case?
-No, it's ________ eraser.
A.a;/
B.an; a
C.a; an
D.an;/