四级练习2012.08.12 challenge, 四级, Leonardo, invented, possible

Rebecca949

There are social and intellectual challenges, too. Leonardo da Vinci, (1)___________________________________ enjoyed every possible challenge. He was an artist and painted the well-known picture, the Mona Lisa. (2)___________________________________________________He was an inventor who invented a device to let people breathe under water. He was a scientist who learned a great deal about (3)__________________________.

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zhant220

1. who lived in Italy during the 15 century
2. he was an engineer who made plans for the city with roads under the street traffic
3. human structure

杨飞飞儿

1 who lived in early 15th century
2 he was an engineer who made plans for the city with the roads under the street for trafic
3 human structure