Whenpeopletalkaboutairpollutiontheyareusuallythinkingaboutoutdoorair____ .Butdoyouknowthatthereis____ airpollutioninsidehomesofficeshotelsandotherbuildings?Theairinyourhomecanbe2to100timesmorepollutedthantheairoutdoors!InfactsomeAmericandoctorssaythat50%ofillnesseshave____todowithpollutedindoorair. Alotofpollutioncomesfromindooractivities___smokingandcooking.Asmostpeople___ about80-90%oftheirtimeinsidebuildingsitisimportanttotakeindoorairpollutionseriouslytoo.Airpollutioninfluencesourhealth____ .Whentheairispollutednotonlyyoungchildrenandoldpeoplesufferfromit____ peoplewithhealthproblemssufferaswell.Indoorairpollutioncan____people'seyesnosesandthroats.Airpollutionbothindoorandoutdoorcanalsoleadtolungcancer（肺癌）andheartdisease!InthegreatLondonfogin19524000peoplediedinafewdays____thepollution!____issaidthathalfamillionyoungchildrenandwomendieeachyearinIndiabecauseofindoorairpollution!

1.A.pollution    B.sadnessC.illness   D.business

2.A.too        B.none  C.also       D.neither

3.A.nothing     B.everythingC.something D.anything

4.A.aswellas   B.suchasC.insteadofD.for example

5.A.take       B.cost       C.give     D.spend

6.A.inmanywaysB.inmanythingsC.inmanyhousesD.bytheway

7.A.and        B.but        C.or         D.until

8.A.hit         B.hurt      C.pollutedD.destroyed

9.A.becauseof    B.thankstoC.relatedtoD.or

10.A.This       B.That        C.What      D.It