A-A+
Advertising media like direct mail radio tel
问题详情
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
参考答案
正确答案：A
解析：根据句意，应用完成时的被动语态，media 是medium 的复数形式。同样单复数变化的词还有bacterium—bacteria(细菌)，datum--data(数据)等。
