Change the following active sentences into passive forms. exchange yourwork with your friend's work. discuss the correct answers with the class.
1. all cameras utilize the same basic design.
2. the modern camera evolved from the camera obscura.
3. a film and video camera operates similarly to a still camera.
4. seafood predominantly includes fish and shellfish.
5. shellfish include various species of molluscs, crustaceans, and echinoderms.
6. deserts cover more than one fifth of the earth's land.
7. sand dunes do not always cover the deserts.
8. global warming threatens to change the ecology of deserts.

1. The same basic design utilized all cameras.

2. From The camera obscura evolved to the modern camera.

3. A still camera operated similarly to a film and video camera.

4. Fish and shellfish predominantly included in seafood.

5. Various species of molluscs, crustaceans, and echinoderms are included in shellfish.

6. more than one fifth of the earth's land was covered with desserts.

7. The desserts do not always covered with sand dunes.

8. The ecology of desserts threatened to change by global warming.

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