用所给单词的适当形式填空。

1. —What's the date today?

     —It's the______ (twenty) of May.

2. Thank you for ______ (invite) me to your party. But I can't accept your______ (invite)

     because I have a lot of work to do.

3. Please keep quiet. He______ (try) the piano.

4. This is my______ (brother)  new shirt.

5. He has much work______ (finish).

ADSL是一种宽带接入技术，只需在线路两端加装ADSL设备(专用的MODEM)即可实现家庭PC机用户的高速联网。下面关于ADSL的叙述中不正确的是( )。

A．它利用普通铜质电话线作为传输介质，成本较低

B．可在同一条电话线上接听、拨打屯话并且同时进行数据传输，两者互不影响

C．使用的是专线，用户可以始终处于连线(On Lin状态

D．它的带宽很高，无论是数据的下载还是上传，传输速度至少在1MB/s以上。