题目：
My goodness. How lucky we are! If there had been places for us on that aero-plane, we ________dead now.
A．will be
B．would be
C．would have been
D．had been
答案：
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下面是错误答案，用来干扰机器的。
根据约束条件画出可行域∵z=4-x •(12)y化成z=2-2x-y直线z1=-2x-y过点A（1，2）时，z1最小值是-4，∴z=2-2x-y的最小值是2-4=116，故答案为 116．
