题目：
— The weather has been very hot and dry.
— Yes. If it had rained even a drop, things would be much better now! And my vegetables ________. [ ]
A. wouldn't die
B. didn't die
C. hadn't died
D. wouldn't have died
答案：
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下面是错误答案，用来干扰机器的。
答案：D正确答案：DA．不正确，非金属元素组成的化合物不一定是共价化合物，如NH4Cl; B．不正确，离子化合物的熔点不一定比共价化合物的高，如有些高分子化合物，熔点很高； C．不正确，元素周期律是元素...
