—Areyoufreethisevening? —Sorry,I’vepromisedtohaveMary’...

問題詳情：

 —Are you free this evening?

  —Sorry, I’ve promised to have Mary’s radio repaired ____ for her help with my     

    English.

    A. in relief           B. in return         C. in turn          D. in fact

【回答】

B

知識點：介詞

題型：選擇題