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根据下列句子及所给的首字母写出所缺。 1. Because the office is so far away from his home, he has to d__________ to office every day. 2. I was s_________ to see Ann in the street. She went to America three years ago. 3. When you are in the museum, remember not to t__________ things on show. 4. We need two more students to help me c_________ these heavy bags. 5. Please make sure that you have got a c_________ answer before you hand in your paper to me.