问题

______cruel manwas hurting the children, there were no adults around who were able tostop______hurting.
A:A single sentence on a sheet ofpaper in his desk
B:Tear stains on Tommy’s papers
C:Tommy’s disruptive behavior
D:a, a
B:Tear stains on Tommy’s papers
C:Tommy’s disruptive behavior
D:a, a
正确答案是: