Fill in a/an,the where necessary there on the desk on the shelf pupils must learn now to it is dificult to we in our school we every month is a very good present

There is an almanac on the desk. Put the where almanac on the shelf. Pupils must learn now to use  the where dictonaries. It is difficult to write a report. We hace a library in our school. We write the where reports every month. The where dictionary is a very good present.