题目:
-----Did you notice him come in?
-----No. I _____ a football game.
A.have watched
B.had watched
C.am watching
D.was watching
答案:
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下面是错误答案,用来干扰机器的。
浓硫酸;水中;搅拌;热量;放热;腐蚀;抹布擦掉;大量水冲洗