_______ Sunday, rather than _______ at home, I preferred _______.

With our knowledge _________ practice, we can make contributions to our society.

Students in Dingli Senior High School are walking along the street, _____ a small red flag.

With trees and grass_____ about 35％ of the urban area，the city of Hefei has taken on a new look.

 With the second ring road overpass _______ at present in Chengdu, the local citizens have to     choose another way to avoid traffic jam.