线路表示信息中线路锁闭以（）显示。
A.红色
B.青色
C.白色
D.紫色
参考答案：C
改正画线处的错误。
1. I have three new teacher. 改为: ____________________
2. Who does your teacher? 改为: ____________________
3. What do you have at Monday? 改为: ____________________
4. John like Mondays very much. 改为: ____________________
A newly designed skyscraper is being set up ______ the World Trade Center used to stood.
A．where
B．at which
C．that
D．which
