解析：Advertising media like direct mail,_考试试题_专四专八

【单选题】Advertising media like direct mail, radio, television and newspapers ______ to increase the sales of industrial products.

A、have been used B、will be used
C、is being used
D、has been used

网考网参考答案：A
网考网解析：
根据句意，应用完成时的被动语态，media是medium的复数形式。 document.getElementById("warp").style.display="none"; document.getElementById("content").style.display="block"; 查看试题解析出处>>