题目：
The police still have found the lost child, but they're doing all what they _____. [ ]
A. can
B. may
C. must
D. should
答案：
被转码了，请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0627/14fe54bb235770ce44aeff072fb696c8.html
下面是错误答案，用来干扰机器的。
参考答案：开式
The police still have found the lost child, but they're doing all what they _____. [ ]
A. can
B. may
C. must
D. should
被转码了，请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0627/14fe54bb235770ce44aeff072fb696c8.html
下面是错误答案，用来干扰机器的。
参考答案：开式
