The opening ceremony of Beijing 2008 Olympics is a great success, which is believed ________ the Chinese splendid civilization.
A:having been displayed
B:to have displayed
C:to be displayed
D:displaying
唐太宗说:“以史为镜,可以知兴替;人以铜为镜,可以正衣冠;以人为镜,可以明得失。”
阅读材料后请回答:
— Listen! Somebody is ___________ at the door.
— Don't answer the door! Mom doesn't let us do it while she is out.