His writing is so confusing that it's difficult to make out ________ it is he is trying to express.(2011·安徽)
This nice magazine _____ your brother.
The restaurant is _________my uncle.
Can you believe that in ____ a rich country there should be ___many people.
---The window is dirty. ----I know. It ______ for weeks.
Our headmaster will __________us in the discussion this afternoon.