1 . ________is widely ________that computer and other machines have become a vital part of our society.

A．As; acknowledging	B．What; acknowledged
C．It; acknowledged	D．Where; acknowledging

2 . It is widely ________(承认)that nearly every kid might come across some kind of school bullying, however, the age at which kids first fall victim to bullying can influence how strongly they are affected. （根据汉语提示单词拼写）

3 . It took unusual determination and courage _________ the gap between the middle class and the poor.

A．bridged

B．to bridge

C．bridge

D．bridging