The __________ (发明) of the camera goes far into the ___________ (过去). In the 1500s, men were experimenting with cameras that made images. But it was not ___________ (直到) the early 1800s that man ___________ (发现) a way to make the pictures permanent. __________ (甚至) then, photography was a new ____________ (领域). Most _________ (家庭) had their pictures __________ (拍) by a photographer. People did not own cameras ____________ (因为) taking pictures and developing the film were too _____________ (困难).

5. My grandmother gave me a treat of some chocolates yesterday. (同义句转换)

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4. He doesn’t have a watch. (改为复数形式)

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3. The student in the front row is a top student. (划线部分提问)

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2. The boys don’t have any erasers. (改为单数形式)

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1. Joanna often does some cleaning on Sunday. (改为否定句)

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5.　　　 Look! __________ their daughter at the door (be)?

4.　　　 Do the students always write __________ (good)? Yes, they do.

3.　　　 I think the twins love _____________(eat) Chinese food.

2.　　　 Oh, yes, Ben ____________ (study) in our school.