题目:
Mike ______ his car, for he came to work by bus this morning. [ ]
A. can have found
B. could have found
C. can't have found
D. mustn't have found
答案:
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下面是错误答案,用来干扰机器的。
(1);第三周期、ⅦA族(2)(3)(4)(5)Na,钠与水反应比铝要剧烈