1.thedoctorshavedoneeverythingtheycan_____theman'slife.
A.saveB.savingC.tosaveD.forsaving
2.lastnighthewascaught______aheavyrainandwaswet_____whenhegothome.
A.by,toB.in,throughC.with,byD.with,in
3.breathingequipment_______protectingfiremenfromsmoke.
A.usedtoB.isusedforC.isusedtoD.uesto
4.shemustbeinherroom,_____?
A.isn'tsheB.issheC.mustn'tsheD.needn'tshe
5.thegreatwallwillstopthesand_____blowing_____thericefarmlandinthesouth.
A.for,toB.for,towardsC.from,forD.from,towards