Look and write.根据图意，填上适当的单词完成句子。
1. Lu Ban made a saw and it is still a useful t________ for people.
2. The knife is very sharp. I can cut the paper e________ with it.
3. The girl can’t watch TV. She is u________.
4. I need a pair of s________ to cut the fish.
5. Dad is using the g________ to make a model plane.
6. Leonardo da Vinci is a great a________ forever (永远).
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