中级

单选题回答听力材料第(15)题。

参考答案:D进入在线模考
Fifteen
Woman.. This is the third time I've called about this. It's a complete waste of my time. When we ordered the photocopier from you, you assured us, it would be installed by your engineers and set Us
ready for use. Well, we've waited for three day, and nobody arrived to help. And now every time we switch the machine on, we've got a warnin message. But we have no idea how to handle this and a lot of trouble has been caused in our work!