问题

The fireman couldn’t __________ what thedark thing was through the heavy smoke
A:I think that the Internet isolates as well as unites us
B:I believe it unites us more than it isolates us
C:busy Dcustom 3 measure A pleasure
D:saved
B:I believe it unites us more than it isolates us
C:busy Dcustom 3 measure A pleasure
D:saved
正确答案是: