高一英语完型the history of chewing gum dated back to more than a c

高一英语完型
the history of chewing gum dated back to more than a century ago.Nowadays,millions of people __21__ the world chew billions of pieces of gum everyday .
chewing gum became popular in the United States mainly _22__ the work of one man ,William Wrigley,_23_ for many years was the head of the Wrigley company.Earlier Thomas Adams first began his experiment in about the years 1870.It was _24_ who first made the gum soft and pleasant to chew._25_ ,it was not until Wrigley joined the business in about 1980 that people everywhere began to _26_ the habit of chewing gum.
Wrigley was ambitious for his business .In his first year,he borrowed money and _27_ more than one million dollars in advertising.For many years,there was a large Wrigley’s advertisement _28_ every streetcar in the United States ._29_ complained that they could not go anywhere _30_ seeing Wrigley’s name .Wrigley even _31_ pieces of gum free to every person _32_ the telephone book of evert city and town in the United States.Finally he began to advertise that it would _33_ good to health to chew gum ,_34_ it calmed the nerves,and that it helped keep the teeth _35_.
He used to give the gum free to every child in the United States on its second birthday.He employed young women who was ordinarily _36_ to go from city in groups of four or five ,_37_ at street concers and give free samples of chewing gum to every person who passed by .In this way each woman _38_ about five thousand _39_ of Wrigley ‘s gum every day .As a result of this painstaking ,people in the United States began to buy _40_ chewing gum.
21.A about B over C throughout D across
22.A since B as C because D because of
23.A that B who C whom D which
24AheBhimChimselfDthey
25A howeverBso C butD then
26 Aturn upBmake upCpick upDset up
27 AspentBtookCcoatDpaid
28 AinBonCaroundDfor
29 AanybodyBpeopleCmenDpassengers
30 AexceptBbutCwithoutDbesides
31 AcarriedBsentCbroughtDtook
32 AinBonCoverDby
33 AdoBmakeCgetDgain
34 AwhyB/CwhichDthat
35 AdirtyBcleanChardDwhite
36 AdressingBwearingCwornDdressed
37 Ato standBstandCstandingDstood
38 Agave offBgave outCgave upDgave away
39 AbagsBpacketsCpiecesDboxes
40 Amany moreBmore or lessCmore and moreD much more

c d b a a c a b b c b a a d b d b d a c