ShehadneverbeentothegreatWallbefore.Todayshesawit

問題詳情：

She had never been to the great Wall before. Today she saw it ________ the first time.

A. at                      B. for                   C. in                            D. by

【回答】

B   

知識點：介詞和介詞短語

題型：選擇題