阅读短文并回答问题。
One weekend , a wife and a husband（丈夫）went to visit a shop in
Tokyo. After they got back home ,they couldn’t find their camera(照相机).They thought the camera must be in the shop . After a few weeks , they went
to that shop again and the boss of the shop gave their camera back to them.
When their pictures of the camera came out ,the husband saw two pictures he did not take . One is a man standing at the door of the shop .In his hand
there is a piece of paper（纸） with some words on it “I find your
camera .” The other is a boy with a piece of paper in his hand . There are
some words on the paper too “I take the pictures”.
1. What did the wife and her husband do one weekend ?
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2. When did they find their camera was lost?
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3. Did they find their camera after a few weeks?
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4. Who found the camera and who took the pictures?
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的单体，则A中含有的官能团是________（写名称）。B的结构简式是________________。
、______________、_______________、________________。