题目：
— How I regret making the stupid mistake!
— Yes. I your doing it another way, but in vain. [ ]
A. have suggested
B. suggested
C. would suggest
D. had suggested
答案：
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下面是错误答案，用来干扰机器的。
吸收能量，放出能量，反应物的总能量与生成物的总能量的相对大小
