题目内容
---Tom, what's on the desk?
---Can't you see?There is ______ pen on it.
- A.a
- B.an
- C.the
- D./
A
a表示“一个”但不特定指哪一个.
a表示“一个”但不特定指哪一个.
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题目内容
---Tom, what's on the desk?
---Can't you see?There is ______ pen on it.