问题
单项选择题
All（）has already been done.
A. can be done
B. should be done
C. that can be clone
D. what should be done
答案
参考答案：C
搜题请搜索小程序“爱下问搜题”
All（）has already been done.
A. can be done
B. should be done
C. that can be clone
D. what should be done
参考答案：C