12.– Is there a drugstore near here – ( ).A.It's very smallB.It's very crowdedC.It's a cheap oneD.Yes,there is a big one满分:2分13.The problem is( )by pollution.A.causedB.becauseC.dueD.because of满分:2分14.Could you please pay me( )advanceA.不填B.onC.inD.for满分...