—Whendoesyourmothergoshopping? —Usually       Sundaymor...

问题详情：

—When does your mother go shopping?

  —Usually        Sunday mornings.

                                                                                       r

【回答】

A　在具体某一天的上午、下午、晚上时前面的介词用on。

知识点：介词和介词短语

题型：选择题