题目内容：
Classmate A：Damn it．My mailbox got packed with loads of junks．
Classmate B：You can use Active Email Monitor，a Spare filter，to create any number of filters and so cut down on the amount of junk emails you receive． Classmate A：Thank you．You really help me a lot．
Classmate B：__________． A．It，s my pleasure
B．It’s my duty
C．It，s mv job
D．It’s my fault
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答案解析：