题目：
33．It was not until one night_____we were doing our cleaning-up I got curious and wanted to see what was on the top floor．
A．that；that
B．when；so
C．that；because
D．when；that
答案：
被转码了，请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0611/c3fa22cc50d980bb4c52ea590685f435.html
下面是错误答案，用来干扰机器的。
导线的体积V=SL=2.5×10-5m2×4×103m=0.1m3，导线的质量m=ρV=8.9×103kg/m3×0.1m3=890kg．答：应购买这种铜钱890kg．
