Ifweviewascienceasabodyofsystematizedknowledge,thenchemistryisusuallycalledanaturalsciencebecauseit(1)_______knowledgeofthenaturalworld.(2)_______wemaywonder(3)_______thereisnocompletesystem(4)_______allofchemistryfitsperfectly.Gapsinthepresentsystem,however,showthatchemistryisstilla(5)_______subjectandthatwe(6)_______allofitsfacts,lawsandtheories.(7)_______,chemistryasascienceisverymuch(8)_______ustoday,anditsfutureholdsthebrightpromise(9)_______muchmoretocome.

Man'sknowledgeabouthimselfandnaturehasgrowninto(10)_______sciences.Thegrowthoftheseparatesciences(11)_______moredevelopmentalthanintentional.Theseparationofthenaturalscienceintophysicalandbiologicalsciences,andphysicalsciencesintophysicsandchemistry,happily(12)_______alargerbodyofknowledgeintomoremanageableparts.Atthesametimewe(13)_______thattheconcepts,techniquesandapplicationsofthevarioussciencesareinterdependentandnotexclusivelyapartofonescienceor(14)_______.Inthis(15)_______,chemistryisakeyscience(16)_______thenaturalsciencesbecauseeveryone,(17)_______theareaofnaturalsciencehewishestopursue,(18)_______atleastanintroductiontotheprinciplesandsimplerapplicationofchemistryasafoundationforhisspecialty.

Chemistrydealswiththe(19)_______ofmatter,changesinmatter,thelawsandprinciples(20)_______thesechanges,andtheconceptsandtheoriesthatinterpretthem.

1.A)isdealtwithx05B)isconnectedx05

C)isconnectedwithx05D)deals

2.A)Attimex05B)Attimesx05C)Sometimex05D)Atanytime

3.A)whyx05B)wherex05C)whenx05D)how

4.A)whichx05B)ofwhichx05C)intowhichx05D)onwhich

5.A)interestingx05B)importantx05C)necessaryx05D)growing

6.A)didn'tdiscoverx05B)hadnotdiscovered

C)haven'tyetdiscoveredx05D)haven'tdiscoveredyet

7.A)Atthesametimex05B)Inthesamewayx05

C)Inotherwordsx05D)Bytheway

8.A)withx05B)forx05C)tox05D)of

9.A)tox05B)ofx05C)forx05D)in

10.A)alotofx05B)akindofx05C)avarietyofx05D)asetof

11.A)wasx05B