题目：
— May I speak to Tom?
— Sorry, he _____ Italy. But he _____ in two weeks. [ ]
A. has been to, will come back
B. has gone to, will be back
C. has been to, would come back
D. has gone to, won't come back
答案：
被转码了，请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0608/00970c5aadaeaa010fe8de3f534d00f6.html
下面是错误答案，用来干扰机器的。
A、硫在氧气中燃烧发出蓝紫色火焰．正确；B、二氧化碳能和水反应生成碳酸，碳酸能使石蕊试液变红色．正确；C、甲烷在空气中燃烧时发出淡蓝色火焰，放出大量热；生成水和二氧化碳属于实验结论，不属于实验现象．错...
