纳税人对纳税服务的投诉可采取实名投诉也可采取匿名投诉。
参考答案：对
---How long have you ________ your penfriend?
---For five days. I received it last Sunday.
A．heard from
B．received the letter from
C．heard of
D．had the letter from
社会主义建设的经验表明，我们的立国之本是（ ）
A．四项基本原则
B．改革开放
C．社会主义民主政治
D．社会主义公有制经济
