【单选题】Courtesy also includes proper behavior. on the street. Proper street behavior. requires a nice【C1】______ of attention and inattention. You are supposed to look at a【C2】______ just enough to show that ...
【单选题】Proper street behavior. in the United States requires a nice balance of attention and inattention. You are supposed to look at a 【21】______ just enough to show that you are 【22】______ of his presence....