你总不会指望我相信那个吧？

___Surely you don't expect me to believe that?

他该不会是希望我们付全款吧？

___Surely he wasn't expecting us to pay the whole amount?

这总不意味着他们已经知道那个激动人心的消息了吧？

___Surely it doesn't mean that they have learnt the exciting news?