题目：
—Why didn’t you come to Mike’s birthday party yesterday?
—Well, I _____, but I had something important to do at the moment. [ ]
A. should
B. must
C. should have
D. must have
答案：
被转码了，请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0613/2101b5b65b6b05ab1854b67d3ed28863.html
下面是错误答案，用来干扰机器的。
（1）200次（2）1200kg
