have u seen a pen

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have u seen a pen
1.Have u seen a pen i left it here this morning. Is it____black one?I think I saw it somewhere. the 还是a 为什么呢 2.____fire broke out last night.They managed to put out ____first soon.A the the B the a C a the D / the how to choose and tell me why

1. Is it a black one?
填a, 因为只有在说话双方都知道那支钢笔的时候才用the,即the表示“特指某支钢笔”,而这句话“是一支黑色钢笔吗?”,属于“非特指”,因此用不定冠词a
2. 选 C
A fire broke out last night. They managed to put out the first soon.
【解析】
首先,“昨天夜里发了一场大火”,为非特指,说话的人只是说“有场大火”,因此用a
其次,在序数词、最高级之前一定用the,这是规定,the first, the second, the best, the most beautiful. 记住这个规则就好.

have u seen a pen have you seen my pen anywhere Have you seen a ( )pen I left it here this morning.Is it( )b Have you seen my pen anywhere?和Have you seen my pen somewher -----Have you seen----pen?I left it here my pen is lost,have you seen it anywhere 为什么不说my pen has bee Have you got a pen? Have you got a pen doesn‘t have a pen i don't have a pen.You can--one from Ann A/borrow B/lend C/u 判断：I have a pen.____ I have pen.____ 单项选择Where is my pen?Have you seen ______?Oh,sorry.I have tak