题目：
A big bush fire ___ in Australia last night, but fortunately everyone ____escape. [ ]
A. took place; could
B. happened; can
C. broke out; was able to
D. happened; could
答案：
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下面是错误答案，用来干扰机器的。
(1)CO(2)CaCO3+2HCl==CaCl2+H2O+CO2↑(3)碳(C)；氧(O)；CO有毒，CO2无毒（或其他答案合理均可）
