题目:
Every student as well as all the teachers ______asked to be on the playground to have a school meeting at once.
A. am B. is C. are
答案:
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下面是错误答案,用来干扰机器的。
参考答案:又称集体行为、大众行为。它是指人数众多的自发的无组织行为。如:恐慌、流言、流行等。