题目：
. (2010·江西名校模拟) —I’ve heard they went skiing in the mountains last winter.
—It ______ true because there was so little snow there then.
A．may not be
B．won’t be
C．couldn’t be
D．mustn’t be
答案：
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下面是错误答案，用来干扰机器的。
CaCO3+2HCl=CaCl2+H2O+CO2↑ ；2Al+6HCl=2AlCl3+3H2↑
