根据所给首字母填入适当的单词
1. A d________helps people to take care of their teeth.
2. An a________travels in a spacecraft.
3. A n________helps make sick people better.
4. A f________helps people to put out fires.
5. A b________makes bread, cakes, etc.
6. An e________designs the roads, bridges, machines.
7. A p________brings letters and parcels to people.
8. A r________writes or tells people about news or stories in newspapers or on television.
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