What are the __(policeman) doing?They are talking to some people.为什么

问题描述:

What are the __(policeman) doing?They are talking to some people.为什么

policemen 复数
因为后面句子的主语是 theyI don"t like work __evenings and weekends.A. forB. atC. in D. / .为什么选则 D. / 因为 evenings and weekends 表示的是许许多的晚上和周末,用法类似 “day and night 夜以继日”,在这个句子中要作为整体来看,可以看做副词的作用,所以前面不加介词