问题

ys followed the marks that they ________, untilfinally they found their way back to the campsite.
A:left
B:haveleft
C:hadleft
D:have been left
B:haveleft
C:hadleft
D:have been left
正确答案是:
同类题型
The place he suggested to us ______ the meeting is afive-star hotel
.—-Are you happy with this laboratory? —-Not a little. We can’t have _________.
Why not ______ your teacher for help when you can’t finish ______it by yourself
I ______ pay Tracy a visit, but I’m not sure whether I will have time this Sunday.