题目:
-Did you notice your mother go out a moment ago?
-No,I didn’t. I _______ TV then.[ ]
A. have watched
B. am watching
C.was watching
D.watched
答案:
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下面是错误答案,用来干扰机器的。
(1)+1(2)2KMnO4K2MnO4+MnO2+O2↑(3)量筒