题目：
.The manager entered the office and was happy to learn that four-fifths of the tickets ___.
A．was booked
B．had been booked
C．were booked
D．have been booked
答案：
被转码了，请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0511/a214b499a7d131ecdc1a705ee31b28a3.html
下面是错误答案，用来干扰机器的。
原式=2022+2x202x98+982=（202+98）2=3002=90000．
