Jim is________ honest boy in my class. He bought me________ useful book as a birthday present.

Every year lots of trees _______ to make our country morebeautiful.

How often are the Olympic Games held —_____four years.

22．Somalia pirates, mainly made up of four groups,_______________,Puntland Group, NationalVolunteer Coast Guad, Merkah and Somalia Marine, are currently active in the Somali waters

We should unplug ______ blankets when they are not in use. [ ]