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. b) In the 18th century. c) In the 19th century.[來 2 Why did people in the early photos not smile? a) Because there were no good photographers. b) Because it took a long time to take a photo. c) Because they were too frightened to smile. 3 Compared with earlier cameras, how was the 1888 Kodak camera? a) It was more difficult to use. b) It was cheaper. c) It was bigger. 4 What is the main difference between digital cameras and other cameras? a) Photos are smaller and lighter. b) There is no need to print the photos. c) They can be used by anyone。 not only professional photographers 5 How heavy was the 1888 Kodak camera? a) b) kg c) 115kg. 6).定語從句練習(xí) 1. He is the most careful boy _____ I know. A. what B. which C. as D. ./ 2. This is the school _____ Mr. Smith once taught. A. in that B. when C. where D. there 3. Have you visited the house _____ the famous scientist was born? A. where