A-A+
______ he can quickly find out what's wrong w
问题详情
______, he can quickly find out what"s wrong with the machine.
A.Having been well trained
B.Having well trained
C.To have been well trained
D.To have been well trained请帮忙给出正确答案和分析,谢谢!
参考答案
正确答案:A
解析:做完作业后,他出去了。