第一部分　阅读理解　(75分)
Passage　1
Until　the　twentieth　century　cigarettes　were　not　an　important　threat　(威胁)　to　public　health.　Men　used　tobacco　mainly　in　the　form　of　cigars　(雪茄烟),　chewing　tobacco,　pipe　tobacco(烟草),　and　snuff　(鼻烟).　Most　women　did　not　use　tobacco　at　all.
The　cigarette　industry　began　in　the　1870s　with　the　development　of　the　cigarette　manufacturing　machines.　This　made　it　possible　to　produce　great　numbers　of　cigarettes　very　quickly,　and　it　reduced　the　price.
Today　cigarettes　smoking　is　a　widespread　habit.　About　forty-three　percent　of　the　adult　men　and　thirty-one　percent　of　the　adult　women　in　the　United　States　smoke　cigarettes　regularly.　It　is　encouraging　to　note,　however,　that　millions　of　people　have　given　up　the　smoking　habit.　Seventy-five　percent　of　the　male　population　and　forty-six　percent　of　the　these　men　and　eleven　percent　of　the　women　have　stopped　smoking.　The　number　of　persons　who　have　given　up　smoking　is　increasing.
Men　as　a　group　smoke　more　than　women.　Among　both　men　and　women　the　age　group　with　the　highest　proportion　(比例)　of　smokers　is　the　age　group　24-44.
Income,　education,　and　occupation　all　play　a　part　in　determining　a　person's　smoking　habits.　City　people　smoke　more　than　people　living　on　farms.　Well-educated　men　with　high　incomes　are　less　likely　to　smoke　cigarettes　than　men　with　fewer　years　of　schooling　and　lower　incomes.　On　the　other　hand　if　a　well-educated　man　with　a　high　income　smokes　as　all,　he　is　likely　to　smoke　more　packs　of　cigarettes　per　day.
The　situation　is　somewhat　different　for　women.　There　are　slightly　more　smokers　among　women　with　higher　family　incomes　and　higher　education　than　among　the　lower　income　and　lower　educational　groups.　These　more　highly　educated　women　tend　to　smoke　more　heavily.
Among　teenagers　(少年)　the　pictures　is　similar.　There　are　fewer　teenager　smokers　from　upper-income,　well-educated　families　and　fewer　from　families　living　in　farm　areas.　High　school　students　who　are　preparing　for　college　are　less　likely　to　smoke　than　those　who　do　not　plan　to　continue　their　education　after　high　school.　Children　are　most　likely　to　start　smoking,　if　one　or　both　of　their　parents　smoke.
1.　Men　use　tobacco　mainly　in　________　forms　in　the　past.
○A.　one
○B.　two
○C.　three
○D.　four

2.　The　cigarette　industry　began　________.
○A.　one　hundred　years　ago
○B.　at　the　turn　of　the　century
○C.　in　the　eighteen　seventies
○D.　in　the　eighteen　century

3.　In　the　United　States　_______　smoke　cigarettes.
○A.　about　forty-three　percent　of　people
○B.　about　thirty-one　percent　of　people
○C.　only　old　people
○D.　about　forty-three　percent　of　the　grown　-　up　men　and　thirty-one　percent　of　the　grown　-up　women

4.　A　man's　smoking　habit　is　partly　determined　by　________.
○A.　his　income
○B.　his　education
○C.　his　occupation
○D.　all　of　the　above

5.　Children　_________　to　start　smoking,　if　their　parents　smoke.
○A.　are　most　likely
○B.　are　less　likely
○C.　hate
○D.　do　not　want