用适当的连接词完成句子。 1. Exactly _ the potato was introduced into Europe is uncertain, but it was probably around 1565. (2014大纲) 2. I think _ impresses me about his painting is the colours he uses. (2014天津) 3. _ we understand things has a lot to do with what we feel. (2015北京)4. _ Li Bai, a great Chinese poet, was born is known to the public, but some wont accept it. (2015江苏)5. It is often the case _ anything is possible for those who hang on to hope. (2016江苏)6. Your support is important to our work, _ you can do helps. (2016北京)Read the passage and choose the suitable clause for each blank.
