（ ）it is not his responsibility to do that, he said he would help.
A、
Although
B、
As
C、
Since
D、
Unless
【正确答案】：A
【题目解析】：
本题考查连词。
although：虽然，尽管；as：当…时，随着；since：自…以来，因为；unless：除非，除非在…情况下。
句意：尽管这样做不是他的责任，但他说他会帮忙的。
所以本题选A。
（ ）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.
Although
As
Since
Unless
本题考查连词。
although：虽然，尽管；as：当…时，随着；since：自…以来，因为；unless：除非，除非在…情况下。
句意：尽管这样做不是他的责任，但他说他会帮忙的。
所以本题选A。