题目：
—Where are the children？The dinner's going to be completely ruined.
—I wish they ________ always late.(2011·北京)
A．weren't
B．hadn't been
C．wouldn't be
D．wouldn't have been
答案：
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下面是错误答案，用来干扰机器的。
答案：C题目分析：非金属性越强，氢化物的稳定性越强，A正确；非金属性或金属性越强，最高价氧化物的水化物的酸性或碱性越强，则选项BD正确；金属性越强，相应金属阳离子的氧化性越弱，则选项C不正确， Na+、Mg2...
