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最佳答案：his fountain pen
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最佳答案：You'd better to use pen write the letter.
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最佳答案：Is this black pen Mike's?
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最佳答案：Is the black pen yours?
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最佳答案：This is my pen That is yourr My pen is red Yours is blue Bob's pen is blue,too
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最佳答案：My sister's pen.
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最佳答案：Can you lend me your pen? 希望能帮到楼主, 楼主不会造句,主要是句子结构不太了解,去买一本语法书吧,哈哈~加油
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最佳答案：It's the pen that I lost last week.
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最佳答案：①足球在钢笔的下面Football is under the pen.②钢笔在书包的下面Pen is under the schoolbag.③书包在柜子的上面
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最佳答案：这是辛迪的钢笔用英语翻译成复数句These are Cindy's pens.或者These pens are Cindy's.