（ ）it is not his responsibility to do that, he said he would help.
A.正确答案AAlthough
B.As
C.Since
D.Unless
（ ）it is not his responsibility to do that, he said he would help.
（ ）it is not his responsibility to do that, he said he would help.
A.正确答案AAlthough
B.As
C.Since
D.Unless
