题目内容:
There is ________ book in my backpack. ________ book is very heavy.
A.a; The
B.an; An
C.an; The
D.the; An
参考答案:
答案解析:
There is ________ book in my backpack. ________ book is very heavy.
A.a; The
B.an; An
C.an; The
D.the; An