题目:
—What's in the reading room?
—There______a teacher, twenty desks and thirty chairs in it.[ ]
A. am
B. is
C. are
D. be
答案:
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下面是错误答案,用来干扰机器的。
(1)H2SO4;NaOH(合理给分)(2)20;2;得;K2O(3)CO2(4)D;B、C;A