Fewcountrieswilladmitofficiallythattheyemployspies.1fromtimetotimeaspyiscaughtandthepublicsometimesgetsaglimpse(一瞥)ofwhatisgoingonbehind2scenes.Spiesarerarely3thesedays.Theyarefrequentlytriedandimprisoned.Ifa(n)4isimportantenoughheissometimes5toanenemycountryinexchangeforanequallyimportantspywhomtheenemyhadcaught.Fewpeoplehavethe6towitnesssuchexchangesfortheyarecarriedoutin7
Onecold8morninglastyearasmallbluecarstoppedona9inaprovincialtowninnorthernGermany.10mendressedinheavyblackcoatsgotoutandstoodonthebridge.11theywaitedtheretheykeptonlookingovertheside.Fifteenminuteslateramotor-boatsailedpastand12theriver-bank.Threemengot13theboatandlookedupatthebridge.Themenonthebridge14walkeddownthestonestepsleadingtothe15.Nowordswerespokenwhenthey16themenfromtheboat.Afterawhilethe17movedoffandthreemen18thebridge.Nowonlytwoofthemwere19blackcoats.Thethirdwasdressedinalightgreyjacket.Anyonewhohadbeenwatchingthe20mightnotrealizedthattwomasterspieshadbeenexchangedonthatcoldwintermorning.
1.A.Asaresult
B.Moreover
C.Therefore
D.However
2.A.political
B.war
C.personal
D.civil
3.A.caught
B.shot
C.praised
D.broadcast
4.A.leader
B.official
C.spy
D.judge
5.A.handedback
B.givenout
C.heldon
D.turndown
6.A.opportunity
B.pace
C.increase
D.performance
7.A.order
B.public
C.advance
D.secret
8.A.spring
B.summer
C.autumn
D.winter
9.A.road
B.boat
C.railway
D.bridge
10.A.Kind
B.Tall
C.Three
D.Old
11.A.While
B.Incase
C.Before
D.Because
12.A.destroyed
B.drewup
C.sentaway
D.setup
13.A.onto
B.overto
C.outof
D.opposite
14.A.