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8. ― (sec) my pen? I can't find it.

一I saw it on the desk just now.

8. Have you seen答語中用了一般過去時表示剛才發(fā)生的事情，與現在無關，但問話者想知道的是對方是否知道鋼筆在哪兒，與現在有關，因此用現在完成時。

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