( )29． Which of the following is NOT true?
- A． In 1884，George Eastman invented a kind of film．
- B． Deep-sea divers take pictures of ocean plants and animals．
- C， The films were developed by the owners of the cameras in the past
- D． Astronauts use cameras to take f，photos in space
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根据所给的全部信息写一篇小短文，80词左右。
信息：1．有许多朋友，其中有一个珍视的朋友，从上学至今一直为友。
2．外表(in appearance)严肃（serious）不失趣味，有时甚至快乐，最博识(most knowledgeable)。
3．既是老师也是朋友，无论何时，他陪伴我。
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50．1 went to Beijing，but my parents__________ (remain) at home．
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49． We__________ (tell) to close the windows before we left the lab．
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48．A talk on developments in science and technology__________ (give)in the school next week．
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47． Silk__________ (feel) soft and cool．
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46． Which Is__________ (difficult) ，part l or part 27
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45．I noticed him __________ (go) into the teachers' office just now．
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44． The machine was used for__________ (cut) the metal．
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43． Tea__________ (bring) to the western world until 1610．
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40． What is the most helpful invention? Do you think?（合并为一句）
What__________ __________ __________ __________the most useful invention?
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