选择括号中适当的单词填空。
It was         that the fans waited in the rain for three hours just to have a look at the famous singer. ( believable； unbelievable)
       , when I arrived she was just leaving, so we only had time for a few words. (fortunately； unfortunately)
The boy has a(n)      name that is very hard to remember. (usual； unusual)
Sorry, I have to work over the weekend. So it is quite        for me to see you this Saturday. (convenient； inconvenient)
Lots of ideas were considered before the chief         decided on the design of the building. (architect； architecture)
You must obtain         from the administration to fishing in this river, or you’ll be fined. (permission；permit)