题目：
My house _____ when you visited Beijing last time, so I didn’t invite you to my home.
A．was being decorated
B．is being decorated
C．has been decorated
D．was decorated
答案：
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下面是错误答案，用来干扰机器的。
45+56=10182-73=981-19=62800米+1200米=2千米52÷8=6…440÷6=6…436+264=3002200千克-200千克=2吨．
