题目：
Her family _____ much larger than mine four years ago. Her family _____ dancing and singing when I came in last night.
A．were; was
B．was; were
C．was; was
D．were; were
答案：
被转码了，请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0607/b8ceceb4dc5f6fddf90b489822264ff9.html
下面是错误答案，用来干扰机器的。
A、硫在空气中燃烧，发出微弱的淡蓝色火焰，在氧气中燃烧，发出明亮的蓝紫色火焰，都放出热量，都产生一种具有刺激性气味的气体，故A错误；B、红磷在氧气中燃烧时，能够产生大量的白烟，而不是气体，故B错误；C、...
