sure造句用surely造一句用be sure to do sth造两句用be sure （where what ho

Surely you locked the door?想必你一定锁上门了吧?
We are sure to benefit from the new timetable. 我们肯定会得益于新的作息时间表.
I am not quite sure what to say about it.
How can I be sure who someone is in Second Life?
I want a dog but not sure which to get?
呵呵,满意吧~