—WhenisLangLang’sconcert?  —It’s       threeo’clock   ...

问题详情：

 —When is Lang Lang’s concert?  

—It’s        three o’clock        the afternoon of December 18th.

A. at ; in                B. at; on                       C. on; in                D. in; on

【回答】

B

知识点：介词和介词短语

题型：选择题