(D) contribute

　　209. Unimprovised, completely structured jazz does exist, but the ability of the best jazz musicians to create music of great cohesion and beauty during a performance has been a hallmark of the music and its major source of inspiration and change.

　　The word "cohesion" is closest in meaning to which of following?

　　(A) sorrow

　　(B) fame

　　(C) unity

　　(D) vibration

　　210. The second distinguishing characteristic of jazz is a rhythmic drive that was initially called "hot" and later "swing."

　　The word "initially" is closest in meaning to which of following?

　　(A) at first

　　(B) shortly

　　211. In playing hot, a musician consciously departs from strict meter to create a relaxed sense of phrasing that also emphasizes the underlying rhythms.

　　The word "consciously" is closest in meaning to which of following?

　　(A) carelessly

　　(B) easily

　　(C) periodically

　　(D) purposely

　　212. Not all jazz is hot, however; many early bands played unadorned published arrangements of popular songs.

　　The word "unadorned" is closest in meaning to which of following?

　　(A) lovely

　　(B) plain

　　(C) disorganized

　　(D) inexpensive

　　213. The tight arrangement enabled the Mandans to protect themselves more easily from the attacks of others who might seek to obtain some of the food these highly capable farmers stored from one years to the next.

　　The word "enabled" is closest in meaning to which of following?

　　(A) covered

　　(B) reminded

　　(C) helped

　　(D) isolated

　　214. They had to exercise considerable skill to produce the desired results, for their northern location meant fleeting growing seasons.

　　The word "considerable" is closest in meaning to which of following?

　　(A) planning

　　(B) much

　　(C) physical

　　(D) new

　　215. This green corn was boiled, dried, and shelled, with some of the maize slated for immediate consumption and the rest stored in animal-skin bags.

　　The word "consumption" is closest in meaning to which of following?

　　(A) decay

　　(B) planting

　　(C) eating

　　(D) conversion

　　216. With appropriate banking of the extrafood, the Mandans protected themselves against the disaster of crop failure and accompanying hunger.

　　The word "disaster" is closest in meaning to which of following?

　　(A) control

　　(B) catastrophe

　　(C) avoidance

　　(D) history

　　217. Helium nuclei have also been found to be constituents of cosmic rays that fall on the earth (cosmic "rays" are not really a form of radiation; they consist of rapidly moving particles of numerous different kinds) .

　　The word "constituents" is closest in meaning to which of following?

　　(A) relatives

　　(B) causes

　　(C) components

　　(D) targets

　　218. Its relative abundance never seems to varymuch. In some places, there may be slightly more of it; in others, slightly less, but the ratio of helium to hydrogen nucleial ways remains about the same.