Teacher 8 and all, please help: travel from Europe back to US

green card holder, plan to use Canadian passport travel to EU, when back to US:
1. need to have green card with a valid passport? Not only green card?
2. any problems of dual nationalities? Before only used chinese passport to China, Canadian passport never has been used. So record in US is chinese citizen with US green card. 
3.In general, is it always feasible to use chinese passport back to China, while use Canadian one traveling to countries where PRC are required to apply visas?
Thanks a lot!

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回复:Teacher 8 and all, please help: travel from Europe back to US -863211- 给 863211 发送悄悄话 863211 的博客首页 (791 bytes) () 08/21/2013 postreply 09:37:26

Thanks! How about answer for question 2 &3? -小小同学- 给 小小同学 发送悄悄话 小小同学 的博客首页 (250 bytes) () 08/21/2013 postreply 11:56:17

回复:Thanks! How about answer for question 2 &3? -863211- 给 863211 发送悄悄话 863211 的博客首页 (696 bytes) () 08/21/2013 postreply 13:38:41

回复:回复:Thanks! How about answer for question 2 &3? -小小同学- 给 小小同学 发送悄悄话 小小同学 的博客首页 (0 bytes) () 08/21/2013 postreply 13:48:12

回复:回复:Thanks! How about answer for question 2 &3? -小小同学- 给 小小同学 发送悄悄话 小小同学 的博客首页 (291 bytes) () 08/21/2013 postreply 13:50:39

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