It's important to inprove my spoken english,这句话中为什么用过去分词spoken?

it's important to keep in good______(health) It's important for students to be____(仔细)in class. 同义句转换 It's important to stay healthy.It's important to keep () in good health. It's important to 和 It'important for 的区别 It's important to have it in the m___.（应该填什么?） it's important for a boy to believe in (h ) on the way to success It's important to learn English well. It's important to have a [ ] lifestyle. it's important to have dreaktfast The t_____ festival in China is the Spring Festival.It's important to eat b_____ diet. It is important for us to s﹍ healthy in our life.填什么? It's very important for teachers to have discipline in the class.中的have discipline是什么意思? Do you think it's important to have some goals in life?英文说两三句 It's important to keep calm when you're in __(dangrous) It's important to get children interested in reading.其中为什么用interested I think _____ important to listen carefully to the teacher in class空应该填it还是it's,原因 It's nice to be important,but it's more important to be nice什么意思 it's important to be happy同义句It's important to be()()