问题
选择题
| This is ______ my pen. I'm writing with _____ pen. |
A. the, / B. /, the C. a, an D. an, / |
答案
答案：B
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| This is ______ my pen. I'm writing with _____ pen. |
A. the, / B. /, the C. a, an D. an, / |
答案：B