问题
___several times, but Mary still has no idea ofhow to do it properly.
A:Beingshown
B:Having shown
C:Having been shown
D:I’ve shown her
B:Having shown
C:Having been shown
D:I’ve shown her
正确答案是：
同类题型
It is estimated that this investment can_____$500000 a year. [ ]
It is I who ____ going to attend the meeting tomorrow.
We can communicate peoplein every part of the world theInternet．
honest, I would rathermydog out, which made so many troubles
Mike had just finished his lunch and was about to take a break _____ an unexpected visitor came