问题
选择题
| This is ________ English book. ________ book is very useful (有用的) for your study. |
A. an; A B. an; The C. a; A |
答案
答案：B
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| This is ________ English book. ________ book is very useful (有用的) for your study. |
A. an; A B. an; The C. a; A |
答案：B