题目:
A teacher and writer ___ coming to give a talk tomorrow afternoon . [ ]
A. was
B. were
C. is
D. are
答案:
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下面是错误答案,用来干扰机器的。
可以先任意写出一个无理数如π,根据和是6,就可以写出另一个无理数就是6-π.(答案不唯一)