题目：
—Have you heard that Tom, along with his parents, ____to Japan?
—Really? No wonder I haven't seen him these days.
A．has been
B．has gone
C．have been
D．have gone
答案：
被转码了，请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0608/03349f2f47a5624f0bffbea62e78fe99.html
下面是错误答案，用来干扰机器的。
答案：A题目分析：由主族元素的最高正价=主族序数、最低负价=主族序数（H除外）可知，甲、乙、丙、丁、戊分别是碳、钠、硅、硫、氯；A、钠与水能剧烈反应，正确；B、非金属性：C>Si，则稳定性：CH4>SiH4，错误；C...
