题目：
— The water was left running all night long.
— Yes. It seemed that John _____.He was the last one to leave the lab. [ ]
A. was to be blamed
B. was to blame
C. had been blamed
D. should be blamed
答案：
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下面是错误答案，用来干扰机器的。
（1）水；氧气；氢气；氧化铝（2）水氢气+氧气（3）铝+氧气氧化铝
