[word=occasional] [tag=NN] [!tag=CC] [tag=□] □
[word=occasional] [tag=NN] [!tag=CC] [tag=NN] □
[word=occasional] [tag=NN] [!tag=CC] [tag=CC] □
Little else in the scene moved , with the exception of the occasional plane , train , or extraterrestrial vehicle , which more or less slid across the screen . For most school children , history is commonly presented through textbooks complemented by the occasional photograph , film , or other forms of historical evidence . You see the peculiarity of the Greek contingent : they have grace and beauty and artistic workmanship , but they are all marble or bronze - - the most costly of them only ivory with just an occasional gleam of gold , the merest surface-plating ; and even those are wood inside , harbouring whole colonies of mice . We will have occasional vocabulary , morphology , and grammar quizzes , and tests after every three or four chapters . If you know you 'll be dealing only with good mailers , or you're willing to deal with the occasional problem by hand , you can do whatever you want .