Word came that the government must control the spread of this disease.

“Our job，”said the　26　officer，“is to spray the wall of every house in every town and village in the malaria parts of Mexico.You may be　27　to learn that there are about ninety-nine thousand　28　villages and towns.Some are big places like the capital city，　29　are single houses deep in the forest or upon the mountaintops.The men working with our program say that most of these people　30　within districts which are　31　enough for the mala ria-carrying mosquitoes to live in and spread the disease.That　32　that we must plan to spray the bricks of　33　three million houses once or twice a year for five years.”

“We have　34　everything very carefully，”said the officer　35　.“Our advance guards have drawn　36　of some forty thousand parts of the country for　37　by the spray teams.Each house in the malaria districts has been given a special　38　so that we can work in order.The United States has given us cars and trucks to carry the spray teams and their　39　.”

“The malaria program has been　40　with the people in this country.Everyone wants to　41　.The Defense Department is helping us plan the　42　of men and supplies.The Education Department has printed sheets in Spanish to explain　43　malaria is spread.Resistance is a problem.It was in the neighboring country—the United States that such resistance to spray was first　44　.Take the　45　of the housefly and D.D.T. At fist D.D.T. killed them off.Now it won’t hurt a fly.”

“What worries people is the danger that the mosquitoes may become resistant，”said the officer at last.

26.A.education              B.wealth                       C.health                       D.medicine

27.A.surprised                     B.excited                      C.doubtful                    D.happy

28.A.united                  B.developing                C.similar                      D.separate

29.A.other                    B.some                         C.the others                  D.the few

30.A.sleep                    B.live                           C.stand                         D.sit

31.A.cold                            B.hot                           C.bright                       D.warm

32.A.saves                    B.expresses                   C.means                       D.is

33.A.nearly                  B.mostly                      C.finally                       D.only

34.A.read                            B.learnt                        C.written                      D.studied

35.A.mentioned            B.remembered                     C.started                       D.continued

36.A.pictures                B.places                       C.maps                         D.bus-lines

37.A.store                    B.use                           C.share                         D.show

38.A.name                    B.sign                          C.number                            D.attention

39.A.tools                    B.clothes                      C.families                     D.guns

40.A.familiar                B.friendly                     C.strict                         D.popular

41.A.work                    B.run                           C.stop                          D.help

42.A.movement            B.program                    C.action                       D.equipment

43.A.why                            B.how                          C.what                         D.that

44.A.proved                 B.killed                        C.thought                            D.discussed

45.A.event                    B.matter                       C.fact                           D.case