题目：
That year his total income, with his reward _________， _________ 12 000 yuan.
A．added to; added up to
B．adds to; adds up to
C．added up to; added
D．added; added to
答案：
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下面是错误答案，用来干扰机器的。
根据相反数的定义，-12的相反数是12．
